Adrian Zielonka's April 2020 Astronomy and Space News
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Naming the Extrasolar Planets
Naming the extrasolar planets W. Lyra Max Planck Institute for Astronomy, K¨onigstuhl 17, 69177, Heidelberg, Germany [email protected] Abstract and OGLE-TR-182 b, which does not help educators convey the message that these planets are quite similar to Jupiter. Extrasolar planets are not named and are referred to only In stark contrast, the sentence“planet Apollo is a gas giant by their assigned scientific designation. The reason given like Jupiter” is heavily - yet invisibly - coated with Coper- by the IAU to not name the planets is that it is consid- nicanism. ered impractical as planets are expected to be common. I One reason given by the IAU for not considering naming advance some reasons as to why this logic is flawed, and sug- the extrasolar planets is that it is a task deemed impractical. gest names for the 403 extrasolar planet candidates known One source is quoted as having said “if planets are found to as of Oct 2009. The names follow a scheme of association occur very frequently in the Universe, a system of individual with the constellation that the host star pertains to, and names for planets might well rapidly be found equally im- therefore are mostly drawn from Roman-Greek mythology. practicable as it is for stars, as planet discoveries progress.” Other mythologies may also be used given that a suitable 1. This leads to a second argument. It is indeed impractical association is established. to name all stars. But some stars are named nonetheless. In fact, all other classes of astronomical bodies are named. -
The Heavens in August a Study of Short Period Variables
100 SCIENTIFIC,AMERlCAN July 31, 1915 The Heavens in August A Study of Short Period Variables By Prof. Henry Norris Russell, Ph.D. HE warm clear nights of summer offer the amateur which is marked on our map, .and the second lies about and but 18 minutes of arc apart, while Neptune is only T the best chance for star-gazing in all the year, and, two fifths of the way from this to () Ophiuchi (also a degree away on the other side. This simultaneous fortunately, he has one of the finest portions of the shown on the map) and is the only bright star near conjunction of three planets is rather remarkable, but, heavens at his command in the splendid region of the this line. The character of the variation is in both as they rise less than an hour earlier than the Sun, Milky Way, which stretches from Cassiopeia and cases very similar to that of the stars previously de Neptune will be utterly invisible, though the other two Cygnus through Aquila to Sagittarius and Scorpio, and scribed. w Sagittarii varies from magnitude 4.3 to 5.1 planets may easily be seen with a telescope (provided forms a vast circle right across the summit of the vault in a period of 7.595 days, the ris� in brightness taking with suitable finding circles ) even in broad daylight, of heaven. about half as long as the fall, and the maximum being and in the same low-power field. The veriest novice can learn in an hour to identify a little more than twice the minimum light. -
October 2006
OCTOBER 2 0 0 6 �������������� http://www.universetoday.com �������������� TAMMY PLOTNER WITH JEFF BARBOUR 283 SUNDAY, OCTOBER 1 In 1897, the world’s largest refractor (40”) debuted at the University of Chica- go’s Yerkes Observatory. Also today in 1958, NASA was established by an act of Congress. More? In 1962, the 300-foot radio telescope of the National Ra- dio Astronomy Observatory (NRAO) went live at Green Bank, West Virginia. It held place as the world’s second largest radio scope until it collapsed in 1988. Tonight let’s visit with an old lunar favorite. Easily seen in binoculars, the hexagonal walled plain of Albategnius ap- pears near the terminator about one-third the way north of the south limb. Look north of Albategnius for even larger and more ancient Hipparchus giving an almost “figure 8” view in binoculars. Between Hipparchus and Albategnius to the east are mid-sized craters Halley and Hind. Note the curious ALBATEGNIUS AND HIPPARCHUS ON THE relationship between impact crater Klein on Albategnius’ southwestern wall and TERMINATOR CREDIT: ROGER WARNER that of crater Horrocks on the northeastern wall of Hipparchus. Now let’s power up and “crater hop”... Just northwest of Hipparchus’ wall are the beginnings of the Sinus Medii area. Look for the deep imprint of Seeliger - named for a Dutch astronomer. Due north of Hipparchus is Rhaeticus, and here’s where things really get interesting. If the terminator has progressed far enough, you might spot tiny Blagg and Bruce to its west, the rough location of the Surveyor 4 and Surveyor 6 landing area. -
Another Unit of Distance (I Like This One Better): Light Year
How far away are the nearest stars? Last time: • Distances to stars can be measured via measurement of parallax (trigonometric parallax, stellar parallax) • Defined two units to be used in describing stellar distances (parsec and light year) Which stars are they? Another unit of distance (I like this A new unit of distance: the parsec one better): light year A parsec is the distance of a star whose parallax is 1 arcsecond. A light year is the distance a light ray travels in one year A star with a parallax of 1/2 arcsecond is at a distance of 2 parsecs. A light year is: • 9.460E+15 meters What is the parsec? • 3.26 light years = 1 parsec • 3.086 E+16 meters • 206,265 astronomical units The distances to the stars are truly So what are the distances to the stars? enormous • If the distance between the Earth and Sun were • First measurements made in 1838 (Friedrich Bessel) shrunk to 1 cm (0.4 inches), Alpha Centauri • Closest star is Alpha would be 2.75 km (1.7 miles) away Centauri, p=0.75 arcseconds, d=1.33 parsecs= 4.35 light years • Nearest stars are a few to many parsecs, 5 - 20 light years 1 When we look at the night sky, which So, who are our neighbors in space? are the nearest stars? Altair… 5.14 parsecs = 16.8 light years Look at Appendix 12 of the book (stars nearer than 4 parsecs or 13 light years) The nearest stars • 34 stars within 13 light years of the Sun • The 34 stars are contained in 25 star systems • Those visible to the naked eye are Alpha Centauri (A & B), Sirius, Epsilon Eridani, Epsilon Indi, Tau Ceti, and Procyon • We won’t see any of them tonight! Stars we can see with our eyes that are relatively close to the Sun A history of progress in measuring stellar distances • Arcturus … 36 light years • Parallaxes for even close stars • Vega … 26 light years are tiny and hard to measure • From Abell “Exploration of the • Altair … 17 light years Universe”, 1966: “For only about • Beta Canum Venaticorum . -
September 2016 BRAS Newsletter
September 2016 Issue th Next Meeting: Monday, Sept. 12 at 7PM at HRPO (2nd Mondays, Highland Road Park Observatory) What's In This Issue? Due to the 1000 Year Flood in Louisiana beginning August 14, some of our club’s activities were curtailed, thus our newsletter is shorter than usual. President’s Message Secretary's Summary for August (no meeting) Light Pollution Committee Report Outreach Report Photo Gallery 20/20 Vision Campaign Messages from the HRPO Triple Conjunction with Moon Observing Notes: Capricornus – The Sea Goat, by John Nagle & Mythology Newsletter of the Baton Rouge Astronomical Society September 2016 BRAS President’s Message This has been a month of many changes for all of us. Some have lost almost everything in the flood, Some have lost a little, and some have lost nothing... Our hearts go out to all who have lost, and thanks to all who have reached out to help others. Due to the flooding, last month’s meeting, at LIGO, was cancelled. The September meeting will be on the 12th at the Observatory, which did not receive any water during the flood, thus BRAS suffered no loss of property. As part of our Outreach effort. If anyone you know has any telescope and/or equipment that was in water during the flood, let us know and we will try to help clean, adjust, etc. the equipment. On September 2nd (I am a little late with this message), Dr. Alan Stern, the New Horizons Primary Investigator, gave two talks at LSU. The morning talk was for Astronomy graduate students, and was a little technical. -
Appendix A: Educational Resources in Astronomy
Appendix A: Educational Resources in Astronomy A.I Planetariums, Museums, and Exhibits A.I.I Planetariums and Museums in the United Kingdom England - AAC Planetarium, Amateur Astronomy Centre, Bacup Road, Clough Bank, Tod morden, Lancs. OLl4 7HW. Tel: 0706816964. - British Museum, Great Russell Street, London WC1B 3DG; Tel: 071-323 8395 ext. 395. Astronomical clocks. - British Museum (Natural History), Cromwell Road, South Kensington, London SW7 5BD; Tel: 071-938 9123. Extensive meteorite collection. - Caird Planetarium, Old Royal Observatory, Greenwich, London SE 10. - William Day Planetarium, Plymouth Polytechnic, School of Maritime Studies, Ply- mouth PL4 8AA. Tel: 0752 264666. - Electrosonic Ltd., 815 Woolwich Road, London SE7 8LT. - Greenwich Planetarium, South Building, Greenwich Park, Greenwich, London SE 10. Tel: 081-858 1167. - William Herschel House and Museum, 19 New King Street, Bath, BA1 2Bl. Con tact: Dr. A.V. Sims, 30 Meadow Park, Bathford, Bath; Tel: 0225 859529. Open Mar-Oct daily 2-5 pm, Nov-Feb Sundays only, 2-5 pm. - lodrell Bank Planetarium and Visitor Center, Lower Withington, Nr. Macclesfield, Cheshire SK11 9DL; Tel: 0477 71339. - Kings Observatory, Kew, Old Deer Park, Richmond, Surrey TW9 2AZ. - University of Leicester, The Planetarium, Department of Astronomy, University Road, Leicester LEI 7RH; Tel: 0533 522522. - Liverpool Museum Planetarium, William Brown Street, Liverpool, Merseyside L3 8EN. Tel: 051-2070001 ext. 225. - London Planetarium, Marylebone Road, London NW1 5LR; Tel: 071-486 1121 (9:30--5:30), 071-486 1121 (recording). - City of London Polytechnic, The Planetarium, 100 Minories, Tower Hill, London EC3N BY. 071-283 1030. - London Schools Planetarium, John Archer School Building, Wandsworth Rd., Sutherland Grove, London SW18; Tel: 081-788 4253. -
29:50 Stars, Galaxies, and the Universe Instructor: Spangler Homework Assignment #3 September 14, 2010 Note: Corresponding Quiz
29:50 Stars, Galaxies, and the Universe Instructor: Spangler Homework Assignment #3 September 14, 2010 Note: Corresponding quiz on ICON must be completed by 8AM, Monday, September 20 1. How can one measure the mass of a star other than the Sun? (a) measuring the color of the star and using a color-mass relationship (b) the apparent magnitude of a star tells its mass (c) the gravitational force on a companion star in a double star (d) the mass of a star is determined by its location in the Galaxy 2. “Solar Analog Stars” are stars very, very similar to the Sun. The Sun has an absolute magnitude of 4.8. If a solar analog star has an apparent magnitude of 3.5, what can you say about it? (a) it is more distant than 10 parsecs (b) it is closer than 10 parsecs (c) it is more massive than the Sun (d) it is 10 parsecs away 3. “Solar Analog Stars” are stars very, very similar to the Sun. The Sun has an absolute magnitude of 4.8. If a solar analog star has an apparent magnitude of 6.0, what can you say about it? (a) it is more distant than 10 parsecs (b) it is closer than 10 parsecs (c) it is more massive than the Sun (d) it is 10 parsecs away 4. The star Alpha Ophiuchi has an apparent magnitude m=2.08. Which of the following stars is fainter than it? (a) Sirius m=-1.47 (b) Antares m=0.92 (c) Theta Capricorni m=4.07 (d) Deneb m=1.26 5. -
Adrian Zielonka's June 2021 Astronomy and Space News
Astronomy News Night Sky 2021 - June Sunrise Sunset Mercury Sets / Venus Sets Rises 1st – 5:02am 1st – 9:17pm 1st – 10:08pm 1st – 10:40pm 10th – 4:57am 10th – 9:25pm 11th – Inf 10th – 10:52pm 20th – 4:56am 20th – 9:29pm Conjunction 20th – 10:57pm 30th – 5:00am 30th – 9:29pm 26th – 4:18am 30th – 10:54pm 30th – 4:05am Moon Rise Moon Set Moon Rise Moon Set 1st - 2:05am 1st - 11:25am 20th – 4:05pm 21st – 2:40am 2nd – 2:26am (ESE) (WSW) 21st – 5:32pm (WSW) 3rd – 2:43am 2nd – 12:40pm (ESE) 22nd – 3:04am 4th – 2:57am 3rd – 1:52pm 22nd – 7:01pm 23rd – 3:34am 5th – 3:11am (E) 4th – 3:01pm (W) 23rd – 8:28pm 24th – 4:15am 6th – 3:25am 5th – 4:09pm 24th – 9:45pm 25th – 5:11am 7th – 3:41am 6th – 5:17pm 25th – 10:47pm 26th – 6:21am (ENE) 7th – 6:26pm 26th – 11:33pm 27th – 7:41am 8th – 3:58 am (WNW) 28th – 12:05am 28th – 9:02am 9th – 4:20am 8th – 7:34pm 29th – 12:29am 29th – 10:21am 10th – 4:48am 9th – 8:42pm (ESE) (WSW) 11th – 5:25am 10th – 9:47pm 30th – 12:48am 30th – 11:36am 12th – 6:11am 11th – 10:46pm 13th – 7:09am 12th – 11:35pm - - - - - - - - - - - - - - 14th – 8:16am 14th – 12:15am 15th – 9:29am 15th – 12:45am All times Moon Phases 16th – 10:44am 16th – 1:10am in notes are set Last Quarter – 2nd (ENE) 17th – 1:30am for New Moon – 10th 17th – 12:02pm (WNW) Somerton First Quarter – 18th – 1:20pm 18th – 1:48am unless stated 18th 19th – 2:41pm (E) 19th – 2:04am (W) Full Moon – 24th 20th – 2:21am A useful site: www.heavens-above.com A S Zielonka From the 30th May – 1st June Mars passes close to the star Kappa Geminorum (3.5 mag). -
Binocular Certificate Handbook
Irish Federation of Astronomical Societies Binocular Certificate Handbook How to see 110 extraordinary celestial sights with an ordinary pair of binoculars © John Flannery, South Dublin Astronomical Society, August 2004 No ordinary binoculars! This photograph by the author is of the delightfully whimsical frontage of the Chiat/Day advertising agency building on Main Street, Venice, California. Binocular Certificate Handbook page 1 IFAS — www.irishastronomy.org Introduction HETHER NEW to the hobby or advanced am- Wateur astronomer you probably already own Binocular Certificate Handbook a pair of a binoculars, the ideal instrument to casu- ally explore the wonders of the Universe at any time. Name _____________________________ Address _____________________________ The handbook you hold in your hands is an intro- duction to the realm far beyond the Solar System — _____________________________ what amateur astronomers call the “deep sky”. This is the abode of galaxies, nebulae, and stars in many _____________________________ guises. It is here that we set sail from Earth and are Telephone _____________________________ transported across many light years of space to the wonderful and the exotic; dense glowing clouds of E-mail _____________________________ gas where new suns are being born, star-studded sec- tions of the Milky Way, and the ghostly light of far- Observing beginner/intermediate/advanced flung galaxies — all are within the grasp of an ordi- experience (please circle one of the above) nary pair of binoculars. Equipment __________________________________ True, the fixed magnification of (most) binocu- IFAS club __________________________________ lars will not allow you get the detail provided by telescopes but their wide field of view is perfect for NOTES: Details will be treated in strictest confidence. -
Clusters Nebulae & Galaxies
CLUSTERS, NEBULAE & GALAXIES A NOVICE OBSERVER’S HANDBOOK By: Prof. P. N. Shankar PREFACE In the normal course of events, an amateur who builds or acquires a telescope will use it initially to observe the Moon and the planets. After the thrill of seeing the craters of the Moon, the Galilean moons of Jupiter and its bands, and the rings of Saturn he(*) is usually at a loss as to what to do next; Mars and Venus are usually disappointing as are the stars (they don’t look any bigger!). If the telescope had good resolution one could observe binaries, but alas, this is often not the case. Moreover, at this stage, the amateur is unlikely to be willing to do serious work on variable stars or on planetary observations. What can he do with his telescope that will rekindle his interest and prepare him for serious work? I believe that there is little better for him to do than hunt for the Messier objects; this book is meant as a guide in this exciting adventure. While this book is primarily a guide to the Messier objects, a few other easy clusters and nebulae have also been included. I have tried, while writing this handbook, to keep in mind the difficulties faced by a beginner. Even if one has good star maps, such as those in Norton’s Star Atlas, a beginner often has difficulty in locating some of the Messier objects because he does not know what he is expected to see! A cluster like M29 is a little difficult because it is a sparse cluster in a rich field; M97 is nominally brighter than M76, another planetary, but is more difficult to see; M33 is an approximately 6th magnitude galaxy but is far more difficult than many 9th magnitude galaxies. -
Serpens – the Serpent
A JPL Image of surface of Mars, and JPL Ingenuity Helicioptor illustration, in flight Monthly Meeting May 10th at 7:00 PM at HRPO, and via Jitsi (Monthly meetings are on 2nd Mondays at Highland Road Park Observatory, will also broadcast via. (meet.jit.si/BRASMeet). PRESENTATION: Dr. Alan Hale, professional astronomer and co-discoverer of Comet Hale-Bopp, among other endeavors. What's In This Issue? President’s Message Member Meeting Minutes Business Meeting Minutes Outreach Report Light Pollution Committee Report Globe at Night SubReddit and Discord Messages from the HRPO REMOTE DISCUSSION Solar Viewing International Astronomy Day American Radio Relay League Field Day Observing Notes: Serpens - The Serpent & Mythology Like this newsletter? See PAST ISSUES online back to 2009 Visit us on Facebook – Baton Rouge Astronomical Society BRAS YouTube Channel Baton Rouge Astronomical Society Newsletter, Night Visions Page 2 of 20 May 2021 President’s Message Ahhh, welcome to May, the last pleasant month in Louisiana before the start of the hurricane season and the brutal summer months that follow. April flew by pretty quickly, and with the world slowly thawing from the long winter, why shouldn’t it? To celebrate, we decided we’re going to try to start holding our monthly meetings at Highland Road Park Observatory again, only with the added twist of incorporating an on-line component for those who for whatever reason don’t feel like making it out. To that end, we’ll have both our usual live broadcast on the BRAS YouTube channel and the Brasmeet page on Jitsi—which is where our out of town guests and, at least this month, our guest speaker can join us. -
Extrasolar Planets and Their Host Stars
Kaspar von Braun & Tabetha S. Boyajian Extrasolar Planets and Their Host Stars July 25, 2017 arXiv:1707.07405v1 [astro-ph.EP] 24 Jul 2017 Springer Preface In astronomy or indeed any collaborative environment, it pays to figure out with whom one can work well. From existing projects or simply conversations, research ideas appear, are developed, take shape, sometimes take a detour into some un- expected directions, often need to be refocused, are sometimes divided up and/or distributed among collaborators, and are (hopefully) published. After a number of these cycles repeat, something bigger may be born, all of which one then tries to simultaneously fit into one’s head for what feels like a challenging amount of time. That was certainly the case a long time ago when writing a PhD dissertation. Since then, there have been postdoctoral fellowships and appointments, permanent and adjunct positions, and former, current, and future collaborators. And yet, con- versations spawn research ideas, which take many different turns and may divide up into a multitude of approaches or related or perhaps unrelated subjects. Again, one had better figure out with whom one likes to work. And again, in the process of writing this Brief, one needs create something bigger by focusing the relevant pieces of work into one (hopefully) coherent manuscript. It is an honor, a privi- lege, an amazing experience, and simply a lot of fun to be and have been working with all the people who have had an influence on our work and thereby on this book. To quote the late and great Jim Croce: ”If you dig it, do it.