DOCSLIB.ORG

Watch This Space for May 2015

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Watch This Space for May 2015 Watch this Space for May 2015 Moon Phases Planet Watch The Planets on view this month are: New Moon First Quarter 18/ 05 / 15 25/ 05 / 15 Mercury: in Tau, visible about 22:00 in the NW Venus: mag -4.1 in Tau/Gem, sets about 00:30 Full Moon Last Quarter Mars: not visible this month 04/ 05 / 15 11/ 05 / 15 Jupiter: mag -1.9 in Cnc, sets about 02:00 Saturn: mag +0.2 in Lib, at opposition on 23rd The Sun Uranus: not visible this month Rises: 05:16, 15th May, Sets: 20:46 Neptune: mag +7.9 in Aqr, rises about 03:00 Constellations of the Month Centaurus Centaurus is a large southern constellation , and has no myths associated with it. It represents the centaur, the half man, half horse creature from Greek mythology. It is 9th out of the 88 Constellations in size (1060 sq. deg.) Notable stars: Cen - Multiple star, 4.32 ly away. A is a G2 very similar to the Sun and B is a slightly smaller K2 star. C, the third component is “Proxima” a M5 red dwarf, the closest star to us is about 2 from the A/B system. Constellation map credit: Cen - Triple star system, 350 ly distant. A is a spectroscopic binary IAU and Sky &Telescope magazine (cropped) of almost identical B1 giant stars. B is a mag 3.7, B2 dwarf at 1.3” distant. V886 Cen - The “Diamond Star”. A carbon star of unusually high mass believed to have a crystalline carbon core. Nicknamed this star "Lucy" after the Beatles song "Lucy in the Sky with Diamonds." Some Interesting Objects: Centaurus contains over 169 NGC objects including 18 open clusters, 2 globular clusters, 143 galaxies, 3 planetary nebulae and 1 reflection nebula. There are no Messier object but there are 6 Caldwell objects. C77 - NGC 5128, Centaurus A. Peculiar galaxy with a central supermassive black hole and dust lane across its centre. It is about 10-16 Mly distant and is the 5th brightest galaxy visible. It emits radiation in all parts of the spectrum from X-ray to radio. C80 - NGC 5139, Omega Centauri. Largest and brightest globular cluster, mag 3.9, distance 15.8 kly. C83 - NGC 4945, spiral galaxy, mag 9.3 C84 - NGC 5286, globular cluster, mag 7.6 C97 - NGC 3766, “The “Pearl” open cluster, mag 5.3 C100 - IC 2944, “The Running Chicken” or Centauri nebula, mag 4.5 C77, NGC 5128, Centaurus A C80, NGC 5139, Omega Centauri C100, Centauri nebula Images: Steve Broadbent, iTelescope T31, both 25min total LRGB Image: ESA 2.2m telescope Lunar Feature of the Month - Wargentin Noted as an “exceptional formation” Wargentin is rather unusual in its appearance. To locate this crater you need to navigate to the lunar south western limb. Once here the large crater Schikard can be used to help find Wargentin which lies just south of Schikard. The best times for observation include 5 days after First Quarter or 4 days after Last Quarter. This crater is unusual as the crater’s floor is filled with lava from the impact that created Wargentin, some 3.8 billion years ago. The impact caused the lunar surface to leak lava and fill the crater virtually to the rim, this subsequently created a lunar plateau that rises from the moons surface. The craters floor is filled with numerous smaller craters and craterlets and a series of wrinkle ridges, looking somewhat like the footprint of a bird, can also be observed. Wargentin. An image from Lunar Orbiter 4 taken in 1967 ©NASA The Sun in April Credit: Space Weather On April 30, a virtually spotless Sun. There have, however, been some fine filaments and prominences. This splendid example was almost as long as the Earth-Moon distance. On April 29th, it erupted, producing a CME, which was not Earth-bound. Credit: Space SOHO Credit: Göran Strand. 27/4/2015. Östersund, Sweden ISS and Iridium Flares this month ISS visibility ISS night-time visibility, magnitude greater than –2.0, height greater than 30° Zenith Start End Date Time Mag Dirn Ht Dirn Ht Dirn Ht No evening passes Satellite events Transits of Sun and Moon longer than 1s, and night- Satellite flares time close passes. Magnitude greater than -4.0, height greater than 30° Date Time Event Date Time Satellite Mag Dirn Ht Thu 7 May 9:28 ISS transit of Sun Wed 6 May 23:27 Iridium 72 -6.0 WSW 33° 12:41 ISS transit of Sun Sat 9 May 20.:15 Iridium 42 -6 E 78° Sun 10 May 8:25 ISS transit of Sun Sun 10 May 20:11 Iridium 40 -6.6 E 80° 11:36 ISS transit of Sun 23:11 Iridium 74 -5.1 WSW 32° Thu 14 May 9:39 ISS transit of Sun Mon 11 May 20:05 Iridium 77 -5.0 E 82° Fri 15 May 7:10 ISS transit of Sun Wed 13 May 21:34 Metop B -5.0 NE 73.5° 8:46 ISS transit of Sun Fri 29 May 23:21 Iridium 20 -4.3 WSW 38° Data from CalSky: http://www.calsky.com .
Load more

Recommended publications
  • Arxiv:1910.11169V1 [Astro-Ph.EP] 24 Oct 2019 Metchev Et Al.(2004) Due to the Detection of a Strong Mid- Tinuum and at HCO+ and CO Gas Emission Lines
    Astronomy & Astrophysics manuscript no. PDS70_v2 c ESO 2019 October 25, 2019 VLT/SPHERE exploration of the young multiplanetary system PDS70? D. Mesa1, M. Keppler2, F. Cantalloube2, L. Rodet3, B. Charnay4, R. Gratton1, M. Langlois5; 6, A. Boccaletti4, M. Bonnefoy3, A. Vigan6, O. Flasseur7, J. Bae8, M. Benisty3; 9, G. Chauvin3; 9, J. de Boer10, S. Desidera1, T. Henning2, A.-M. Lagrange3, M. Meyer11, J. Milli12, A. Müller2, B. Pairet13, A. Zurlo14; 15; 6, S. Antoniucci16, J.-L. Baudino17, S. Brown Sevilla2, E. Cascone18, A. Cheetham19, R.U. Claudi1, P. Delorme3, V. D’Orazi1, M. Feldt2, J. Hagelberg19, M. Janson20, Q. Kral4, E. Lagadec21, C. Lazzoni1, R. Ligi22, A.-L. Maire2; 23, P. Martinez21, F. Menard3, N. Meunier3, C. Perrot4; 24; 25, S. Petrus3, C. Pinte26; 3, E.L. Rickman19, S. Rochat3, D. Rouan4, M. Samland2; 20, J.-F. Sauvage27; 6, T. Schmidt4; 28, S. Udry19, L. Weber19, F. Wildi19 (Affiliations can be found after the references) Received / accepted ABSTRACT Context. PDS 70 is a young (5.4 Myr), nearby (∼113 pc) star hosting a known transition disk with a large gap. Recent observations with SPHERE and NACO in the near-infrared (NIR) allowed us to detect a planetary mass companion, PDS 70 b, within the disk cavity. Moreover, observations in Hα with MagAO and MUSE revealed emission associated to PDS 70 b and to another new companion candidate, PDS 70 c, at a larger separation from the star. PDS 70 is the only multiple planetary system at its formation stage detected so far through direct imaging. Aims. Our aim is to confirm the discovery of the second planet PDS 70 c using SPHERE at VLT, to further characterize its physical properties, and search for additional point sources in this young planetary system.
    [Show full text]
  • Issue 59, Yir 2015
    1 Director’s Message 50 Fast Turnaround Program Markus Kissler-Patig Pilot Underway Rachel Mason 3 Probing Time Delays in a Gravitationally Lensed Quasar 54 Base Facility Operations Keren Sharon Gustavo Arriagada 7 GPI Discovers the Most Jupiter-like 58 GRACES: The Beginning of a Exoplanet Ever Directly Detected Scientific Legacy Julien Rameau and Robert De Rosa André-Nicolas Chené 12 First Likely Planets in a Nearby 62 The New Cloud-based Gemini Circumbinary Disk Observatory Archive Valerie Rapson Paul Hirst 16 RCW 41: Dissecting a Very Young 65 Solar Panel System Installed at Cluster with Adaptive Optics Gemini North Benoit Neichel Alexis-Ann Acohido 21 Science Highlights 67 Gemini Legacy Image Releases Nancy A. Levenson Gemini staff contributions 30 On the Horizon 72 Journey Through the Universe Gemini staff contributions Janice Harvey 37 News for Users 75 Viaje al Universo Gemini staff contributions Maria-Antonieta García 46 Adaptive Optics at Gemini South Gaetano Sivo, Vincent Garrel, Rodrigo Carrasco, Markus Hartung, Eduardo Marin, Vanessa Montes, and Chad Trujillo ON THE COVER: GeminiFocus January 2016 A montage featuring GeminiFocus is a quarterly publication a recent Flamingos-2 of the Gemini Observatory image of the galaxy 670 N. A‘ohoku Place, Hilo, Hawai‘i 96720, USA NGC 253’s inner region Phone: (808) 974-2500 Fax: (808) 974-2589 (as discussed in the Science Highlights Online viewing address: section, page 21; with www.gemini.edu/geminifocus an inset showing the Managing Editor: Peter Michaud stellar supercluster Science Editor: Nancy A. Levenson identified as the galaxy’s nucleus) Associate Editor: Stephen James O’Meara and cover pages Designer: Eve Furchgott/Blue Heron Multimedia from each of issue of Any opinions, findings, and conclusions or GeminiFocus in 2015.
    [Show full text]
  • The Nearest Stars: a Guided Tour by Sherwood Harrington, Astronomical Society of the Pacific
    www.astrosociety.org/uitc No. 5 - Spring 1986 © 1986, Astronomical Society of the Pacific, 390 Ashton Avenue, San Francisco, CA 94112. The Nearest Stars: A Guided Tour by Sherwood Harrington, Astronomical Society of the Pacific A tour through our stellar neighborhood As evening twilight fades during April and early May, a brilliant, blue-white star can be seen low in the sky toward the southwest. That star is called Sirius, and it is the brightest star in Earth's nighttime sky. Sirius looks so bright in part because it is a relatively powerful light producer; if our Sun were suddenly replaced by Sirius, our daylight on Earth would be more than 20 times as bright as it is now! But the other reason Sirius is so brilliant in our nighttime sky is that it is so close; Sirius is the nearest neighbor star to the Sun that can be seen with the unaided eye from the Northern Hemisphere. "Close'' in the interstellar realm, though, is a very relative term. If you were to model the Sun as a basketball, then our planet Earth would be about the size of an apple seed 30 yards away from it — and even the nearest other star (alpha Centauri, visible from the Southern Hemisphere) would be 6,000 miles away. Distances among the stars are so large that it is helpful to express them using the light-year — the distance light travels in one year — as a measuring unit. In this way of expressing distances, alpha Centauri is about four light-years away, and Sirius is about eight and a half light- years distant.
    [Show full text]
  • The Radio Continuum View of Centaurus Acentaurus A
    TheThe radioradio continuumcontinuum viewview ofof CentaurusCentaurus AA Ron Ekers CSIRO The Many Faces of Centaurus A Sydney, 29 June 2009 Ilana's composite Morganti et al. 1999 9° 10' Burns et al. xx image courtesy Norbert Junkes (MPIfR) WhyWhy CentaurusCentaurus AA isis specialspecial ■ the first extragalactic radio source ■ the brightest source in the Southern Hemisphere ■ the second double lobed source discovered ± after Cygnus A ■ the closest Radio Galaxy ■ the closest AGN ■ the closest SMBH ± VLBI resolution 0.01pc, 100 Rs ■ A spectacular galaxy EvolutionEvolution ofof thethe ModelsModels ■ Radio sources ± Static magnetic field 1960 ± Evolutionary sequence 1970 ± Continuous injection ± Continuous reacceleration ■ Energy source ± Galaxy collisions 1950's ± Nuclear accretions 1960- ± Accretion triggered by collisions 1980- CentaurusCentaurus AA thethe closestclosest AGNAGN ■ Distance 3.4Mpc ■ Next closest comparable AGN M87 17Mpc ! ■ Average distance to a L=1024 W Hz-1 radio galaxies ± 10Mpc ± So we are lucky (or influenced!) ■ Much easier to study at all wavelengths ■ Subtends a large angular size ± Good linear resolution ± Background probes SomeSome RadioRadio GalaxiesGalaxies Name Size Log Log (kpc) Luminosity Energy (ergs sec-1) (ergs) Centaurus A 470 41.7 59.9 Cygnus A 200 45.2 60.6 M87 80 42.0 58.6 M82 1 39.5 55.2 PolarizationPolarization inin CentaurusCentaurus AA Bracewell 1962 ■ April 1962 ■ Parkes 64m just completed ■ Discovered by Bracewell ± Published Cooper and Price ± Visitors Log ± Not a National Facilities yet! ■ Connie
    [Show full text]
  • TESS Discovery of a Super-Earth and Three Sub-Neptunes Hosted by the Bright, Sun-Like Star HD 108236
    Swarthmore College Works Physics & Astronomy Faculty Works Physics & Astronomy 2-1-2021 TESS Discovery Of A Super-Earth And Three Sub-Neptunes Hosted By The Bright, Sun-Like Star HD 108236 T. Daylan K. Pinglé J. Wright M. N. Günther K. G. Stassun Follow this and additional works at: https://works.swarthmore.edu/fac-physics See P nextart of page the forAstr additionalophysics andauthors Astr onomy Commons Let us know how access to these works benefits ouy Recommended Citation T. Daylan, K. Pinglé, J. Wright, M. N. Günther, K. G. Stassun, S. R. Kane, A. Vanderburg, D. Jontof-Hutter, J. E. Rodriguez, A. Shporer, C. X. Huang, T. Mikal-Evans, M. Badenas-Agusti, K. A. Collins, B. V. Rackham, S. N. Quinn, R. Cloutier, K. I. Collins, P. Guerra, Eric L.N. Jensen, J. F. Kielkopf, B. Massey, R. P. Schwarz, D. Charbonneau, J. J. Lissauer, J. M. Irwin, Ö Baştürk, B. Fulton, A. Soubkiou, B. Zouhair, S. B. Howell, C. Ziegler, C. Briceño, N. Law, A. W. Mann, N. Scott, E. Furlan, D. R. Ciardi, R. Matson, C. Hellier, D. R. Anderson, R. P. Butler, J. D. Crane, J. K. Teske, S. A. Shectman, M. H. Kristiansen, I. A. Terentev, H. M. Schwengeler, G. R. Ricker, R. Vanderspek, S. Seager, J. N. Winn, J. M. Jenkins, Z. K. Berta-Thompson, L. G. Bouma, W. Fong, G. Furesz, C. E. Henze, E. H. Morgan, E. Quintana, E. B. Ting, and J. D. Twicken. (2021). "TESS Discovery Of A Super-Earth And Three Sub-Neptunes Hosted By The Bright, Sun-Like Star HD 108236".
    [Show full text]
  • Arxiv:2007.04823V1 [Astro-Ph.HE] 9 Jul 2020 Inverse Compton-CMB Models , Although Other Evidence Seems to Be Compatible With
    Title: Resolving acceleration to very high energies along the Jet of Centaurus A Author: The H.E.S.S. Collaboration Correspondence to: [email protected] The full author list with affiliations can be found at the end of this paper Summary: The nearby radio galaxy Centaurus A belongs to a class of Active Galaxies that are very luminous at radio wavelengths. The majority of these galaxies show collimated relativistic outflows known as jets, that extend over hundreds of thousands of parsecs for the most powerful sources. Accretion of matter onto the central super-massive black hole is be- lieved to fuel these jets and power their emission 1, with the radio emission being related to the synchrotron radiation of relativistic electrons in magnetic fields. The origin of the extended X-ray emission seen in the kiloparsec-scale jets from these sources is still a mat- ter of debate, although Centaurus A’s X-ray emission has been suggested to originate in electron synchrotron processes 2–4. The other possible explanation is inverse Compton scat- tering with CMB soft photons 5–7. Synchrotron radiation needs ultra-relativistic electrons (∼ 50 TeV), and given their short cooling times, requires some continuous re-acceleration mechanism to be active 8. Inverse Compton scattering, on the other hand, does not require very energetic electrons, but requires jets that stay highly relativistic on large scales (≥1 Mpc) and that remain well-aligned with the line of sight. Some recent evidence disfavours 9–12 arXiv:2007.04823v1 [astro-ph.HE] 9 Jul 2020 inverse Compton-CMB models , although other evidence seems to be compatible with them 13, 14.
    [Show full text]
  • A Basic Requirement for Studying the Heavens Is Determining Where In
    Abasic requirement for studying the heavens is determining where in the sky things are. To specify sky positions, astronomers have developed several coordinate systems. Each uses a coordinate grid projected on to the celestial sphere, in analogy to the geographic coordinate system used on the surface of the Earth. The coordinate systems differ only in their choice of the fundamental plane, which divides the sky into two equal hemispheres along a great circle (the fundamental plane of the geographic system is the Earth's equator) . Each coordinate system is named for its choice of fundamental plane. The equatorial coordinate system is probably the most widely used celestial coordinate system. It is also the one most closely related to the geographic coordinate system, because they use the same fun­ damental plane and the same poles. The projection of the Earth's equator onto the celestial sphere is called the celestial equator. Similarly, projecting the geographic poles on to the celest ial sphere defines the north and south celestial poles. However, there is an important difference between the equatorial and geographic coordinate systems: the geographic system is fixed to the Earth; it rotates as the Earth does . The equatorial system is fixed to the stars, so it appears to rotate across the sky with the stars, but of course it's really the Earth rotating under the fixed sky. The latitudinal (latitude-like) angle of the equatorial system is called declination (Dec for short) . It measures the angle of an object above or below the celestial equator. The longitud inal angle is called the right ascension (RA for short).
    [Show full text]
  • Gli Ammassi Di Galassie
    Universo in Fiore 2017 CORSO BASE I GIGANTI DEL COSMO: GLI AMMASSI DI GALASSIE Sabrina De Grandi [email protected] Organizzazione spaziale delle galassie Ammassi Gruppi Galassie 100 mila a.l. ~30 kpc 3 milioni a.l. ~ 103 kpc 20 milioni a.l. ~ 7x103 kpc I primi cataloghi di ammassi Fino agli anni ’80: ispezione visuale di lastre fotografiche alla ricerca di sovradensita` di galassie. Es. di lastre fotografiche: • PSS: National Geographic Society-Palomar Observatory Sky Survey (Telescopio 5m Hale, Mt. Wilson US) • UKST: Schmidt telescope IIIa-J plates (Telescopio 1.2m, UK-Australia),… I cataloghi di Abell (1958) e Zwicky (1961-1968) Il catalogo piu` usato: Abell (1958) Emisfero Nord (2712) e A.C.O. (1989) Emisfero Sud (1364). 1958: Abell ispeziono` di 104 deg2 di lastre PSS (Luna ~0.25 deg2) Criteri principali: • almeno 30 galassie • compatto (0.02<z<0.2) • piano galattico escluso Dagli anni ’90: • algoritmi automatici di identificazione al posto dell’occhio umano. • Non più lastre fotografiche, ma immagini digitali (CCD) • SDSS (Sloan Digital Sky Survey), iniziata nel 2000 e tutt’ora in atto (35% del cielo osservato, 500 milioni di oggetti, catalogo di ammassi • Accesso libero ai dati (nel Telescopio dedicato ad 2015: 13o Data Release) Apache Point 2.5m (US) Immagine SDSS dell’ammasso A2142 MACS J1206.2-0847 DIAMETRO tipico di un ammasso di galassie ~ 20 milioni anni luce ~ 7 Mpc SPICA (훼 costellazione della Vergine) MACS J1206.2-0847 DIAMETRO tipico di un ammasso di galassie ~ 20 milioni anni luce ~ 7 Mpc ma… DISTANZA di MACS J1206 ~ 4.5 miliardi di anni luce ~ 1500 Mpc Dove si trova la Via Lattea in questa struttura universale? ovvero Noi ci troviamo in un Ammasso di galassie? Il Gruppo Locale 100.000 a.l.
    [Show full text]
  • August 2012 of You Know I Went to the Astronomical League Conference (Alcon) in Chicago at the Beginning of July with My Grandmother
    BACKBACK BAYBAY observerobserver The Official Newsletter of the Back Bay Amateur Astronomers P.O. Box 9877, Virginia Beach, VA 23450-9877 Looking Up! Hello again! This month I actually have a story EPHEMERALS to tell, instead of just random ramblings. As most august 2012 of you know I went to the Astronomical League Conference (ALCon) in Chicago at the beginning of July with my grandmother. It was great. Not quite 08/24, 7:00 pm as good as last year, seeing as I had to pay for it Night Hike and they didn’t give me a check and a plaque this Northwest River Park year (last year I won the Horkheimer Youth award, which paid for my trip), but it was still a lot of fun, and very educational. I met a lot of cool 08/24, 8:00 pm people and definitely learned something. The Garden Stars whole trip was a big story, but a few events stand Norfolk Botanical Gardens out the most in my memory, and they’re all connected to some extent. 08/28, 7:00 pm Boardwalk Astronomy It all started on the day we got there. ALCon is Near 24th St Stage an annual four day conference usually in the VA Beach Oceanfront beginning of July. This year, the day we got there was July fourth. After checking in, taking a nap and 09/06, 7:30 pm dining, we decided to participate in the observing BBAA Monthly Meeting event outside the hotel. It was in a parking lot with lights, and fireworks, but there was a large moon TCC Campus and Saturn was up, so we went for it.
    [Show full text]
  • The Sky This Week
    The sky this week April 20 to April 26, 2020 By Joe Grida, Technical Informaon Officer, ASSA ([email protected]) elcome to the fourth edion of The Sky this Week. It is designed to keep you looking up during these rather uncertain mes. We can’t get together for Members’ Viewing Nights, so I thought I’d write this W to give you some ideas of observing targets that you can chase on any clear night this coming week. As I said in my recent Starwatch* column in The Adverser newspaper: “Even with the restricons in place, stargazing is something that you can do easily on your own. It helps to relieve stress and will keep your sense of perspecve. It’s prey hard to walk away from a night under the stars without a jusfiable sense of awe. And also without sensing a real, albeit tenuous, connecon with the cosmos at large”. * Published on the last Friday of each month Naked eye star walk Over in the eastern late evening sky, Scorpius, the Scorpion (one of the few constellaons in our sky that actually resembles what it is supposed to represent) is difficult to miss. He will keep us company over the coming chilly winter months. Its brightest star, Antares, is a huge star of gargantuan proporons. If we replaced our Sun with it, then all the planets from Mercury through to Jupiter would all find themselves engulfed within it! Just below the tail of Scorpius, you can find the star clusters designated M6 and M7. Take the trouble to observe these with binoculars.
    [Show full text]
  • Stsci Newsletter: 2011 Volume 028 Issue 02
    National Aeronautics and Space Administration Interacting Galaxies UGC 1810 and UGC 1813 Credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA) 2011 VOL 28 ISSUE 02 NEWSLETTER Space Telescope Science Institute We received a total of 1,007 proposals, after accounting for duplications Hubble Cycle 19 and withdrawals. Review process Proposal Selection Members of the international astronomical community review Hubble propos- als. Grouped in panels organized by science category, each panel has one or more “mirror” panels to enable transfer of proposals in order to avoid conflicts. In Cycle 19, the panels were divided into the categories of Planets, Stars, Stellar Rachel Somerville, [email protected], Claus Leitherer, [email protected], & Brett Populations and Interstellar Medium (ISM), Galaxies, Active Galactic Nuclei and Blacker, [email protected] the Inter-Galactic Medium (AGN/IGM), and Cosmology, for a total of 14 panels. One of these panels reviewed Regular Guest Observer, Archival, Theory, and Chronology SNAP proposals. The panel chairs also serve as members of the Time Allocation Committee hen the Cycle 19 Call for Proposals was released in December 2010, (TAC), which reviews Large and Archival Legacy proposals. In addition, there Hubble had already seen a full cycle of operation with the newly are three at-large TAC members, whose broad expertise allows them to review installed and repaired instruments calibrated and characterized. W proposals as needed, and to advise panels if the panelists feel they do not have The Advanced Camera for Surveys (ACS), Cosmic Origins Spectrograph (COS), the expertise to review a certain proposal. Fine Guidance Sensor (FGS), Space Telescope Imaging Spectrograph (STIS), and The process of selecting the panelists begins with the selection of the TAC Chair, Wide Field Camera 3 (WFC3) were all close to nominal operation and were avail- about six months prior to the proposal deadline.
    [Show full text]
  • 407 a Abell Galaxy Cluster S 373 (AGC S 373) , 351–353 Achromat
    Index A Barnard 72 , 210–211 Abell Galaxy Cluster S 373 (AGC S 373) , Barnard, E.E. , 5, 389 351–353 Barnard’s loop , 5–8 Achromat , 365 Barred-ring spiral galaxy , 235 Adaptive optics (AO) , 377, 378 Barred spiral galaxy , 146, 263, 295, 345, 354 AGC S 373. See Abell Galaxy Cluster Bean Nebulae , 303–305 S 373 (AGC S 373) Bernes 145 , 132, 138, 139 Alnitak , 11 Bernes 157 , 224–226 Alpha Centauri , 129, 151 Beta Centauri , 134, 156 Angular diameter , 364 Beta Chamaeleontis , 269, 275 Antares , 129, 169, 195, 230 Beta Crucis , 137 Anteater Nebula , 184, 222–226 Beta Orionis , 18 Antennae galaxies , 114–115 Bias frames , 393, 398 Antlia , 104, 108, 116 Binning , 391, 392, 398, 404 Apochromat , 365 Black Arrow Cluster , 73, 93, 94 Apus , 240, 248 Blue Straggler Cluster , 169, 170 Aquarius , 339, 342 Bok, B. , 151 Ara , 163, 169, 181, 230 Bok Globules , 98, 216, 269 Arcminutes (arcmins) , 288, 383, 384 Box Nebula , 132, 147, 149 Arcseconds (arcsecs) , 364, 370, 371, 397 Bug Nebula , 184, 190, 192 Arditti, D. , 382 Butterfl y Cluster , 184, 204–205 Arp 245 , 105–106 Bypass (VSNR) , 34, 38, 42–44 AstroArt , 396, 406 Autoguider , 370, 371, 376, 377, 388, 389, 396 Autoguiding , 370, 376–378, 380, 388, 389 C Caldwell Catalogue , 241 Calibration frames , 392–394, 396, B 398–399 B 257 , 198 Camera cool down , 386–387 Barnard 33 , 11–14 Campbell, C.T. , 151 Barnard 47 , 195–197 Canes Venatici , 357 Barnard 51 , 195–197 Canis Major , 4, 17, 21 S. Chadwick and I. Cooper, Imaging the Southern Sky: An Amateur Astronomer’s Guide, 407 Patrick Moore’s Practical
    [Show full text]