Skylights featured on Astronomy Picture of the Day |
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Skylights featured nine times on Earth Science Picture of the Day: 1 2 3 4 5 6 7 8 9 |
| Go to STARS for previous stars of the week. | Last week's Skylights is still available. | Access Skylights' Archive and photo gallery. | From the Sun to the Stars: the OLLI Lectures provides a linked, illustrated introduction to astronomy. |
| The Constellations has a linked list with locations and brightest stars. | Constellation Maps show the locations of the constellations. | The 170 Brightest Stars lists them through magnitude 3.00. | For more on stars and constellations, visit Stellar Stories. |
| Tour the Milky Way. | Watch a total eclipse of the Moon and an annular eclipse of the Sun. | Moon Light presents scenic photos of the Moon. | Go to MoonScapes for labelled telescopic images of the Moon and other lunar information. |
| See the Moon move and pass just below Nu Virginis. | Watch planets move against the background stars. | See a classic proof of the curvature of the Earth with a "hull down" series. | Visit Measuring the Sky to learn about the celestial sphere. |
| Admire sunsets, rainbows, and other sky phenomena in Sunlight. | Read the illustrated Day Into Night on the phenomena of the sky | See the The Aurora and the Midnight Sun. | See and understand the ocean tides. |
| Enjoy Our Complex Universe: A Human Understanding through Art, with 12 illustrations. | Advances in Astronomy, 1989-2011. | Take a ride aboard Asteroid 17851 Kaler (1998 JK). | Look for Books about the sky and stars. |
Support science
literacy by joining the Astronomical
Society of the Pacific, an international organization that is
among the world's premier providers of astro education. Get
Mercury and a variety of other benefits. | Presenting three audio courses with 70 to 100-page study guides, narrated and written by Jim Kaler. | ||
| Heavens Above: Stars, Constellations, and the Sky from Recorded Books. | Astronomy: Earth, Sky, and Planets, is available from Recorded Books. | Astronomy: Stars, Galaxies, and the Universe, is also now available from Recorded Books. |
| Astronomy: Earth, Sky, and Planets is published as Vault of the Heavens: Exploring the Solar System's Place in the Universe by Barnes and Noble. | ||
To learn about
stellar spectra, read STARS AND THEIR
SPECTRA: An Introduction to the Spectral Sequence, Second
Ed., with two new chapters and 140 new illustrations, Cambridge
University Press (UK or North America),
2011.
NEWEST! FIRST MAGNITUDE: A Book of the
Bright Sky, World Scientific, 2013. Read the
interview with Jim Kaler.
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Omega Leo B, a sunlike star, orbits somewhat more massive Omega A (at the cross) every 118 years at an average separation of 28.6 Astronomical Units, at least according to the orbital solution (the orbital size perhaps larger). In reality, the two orbit a common center of mass. The true major axis of the elliptical orbit, the dot-dash line, is offset from that of the observed ellipse because of the orbital tilt of 65 degrees to the plane of the sky combined with the orbit's orientation. From the Sixth Catalog of Orbits of Visual Binary Stars , W. I. Hartkopf and B. D. Mason, US Naval Observatory Double Star Catalog, 2006. |