Lunar Libration . Articles | ... Actually, a slight rocking motion, called libration,* makes about 59% of the Moon's surface visible from our planet Earth -- though only 50% at any one time. ... Add to that, the approximate 1.5 degree tilt of the Moon's equator to the ecliptic, and you have the inclination of the Moon's equator to the plane of its orbit around Earth at some 6.5 degrees (5 + 1.5 = 6.5). ... Re-published on Astronomy Net with permission of the author. ... www.astronomy.net . ...

... 63 23'37".0 Mag 19.9:06/19, Type unknown (z=0.1358) 2001kf - 2001kh , IAUC 7957 discovered by R. Ellis et. el. the brightest of which is mag 21.0. 2001kf discovered 2001/10/10 at R.A. = 22h21m34s.20, Decl. ... 2001io, 2001ip , IAUC 7780 discovered by G. Altavilla, et. el. 2001io discovered 2001/12/08 at R.A. = 00h45m53s.64, Decl. ... 08 11'26".4 Mag 23.0:04/18, Type Ia? (z=0.582) 2001ge - 2001gj , IAUC 7762 discovered by G. Altavilla, et. el. 2001ge discovered 2001/11/11 at R.A. = 20h31m14s.44, Decl...

Statistics of sunspot activity . The sunspot indices . ... Visual indices of solar activity . ... n - number of spot groups . A - Waldmeier class of unipolar spot groups without penumbra . B - class of bipolar spot groups without penumbra . C - class of bipolar spot groups with one penumbra pole . D - class of small bipolar spot groups with two penumbra poles . E - class of middle bipolar spot groups with two penumbra poles . ... H - class of unipolar penumbrated spot groups . ...

... Samples of expected results from an intensive search for planets about stars acting as gravitational lenses (lens stars) of galactic bulge stars (source stars) during microlensing events are constructed. ... The Gould and Loeb (1992) detection probabilities are scaled to arbitrary planetary mass and mean lens distance and averaged over the lens mass function. ... The expected total number of planets detected depends entirely on the assumptions about the nature of the planetary systems being sought. ...

... Telescopes in the southern and northern hemispheres, with a longitude difference that enables students to observe the night sky in daytime classes, are linked by Internet2 to campuses in Louisville, Kentucky, and Toowoomba, Queensland. ... Kent Observatory in Australia offers the center of the Milky Way, the Magellanic Clouds, and transient events not visible from mid-latitudes in the northern hemisphere. ... The Observatories . ... Northern hemisphere: Moore Observatory near Louisville, Kentucky . ...

... Tonight's Sky . ... News . ... Sky this Month . ... Star Atlas . ... Supernova showered Earth with radioactive debris . ... galaxies . stars . ... Bright new supernova blows up in the Cigar Galaxy (M82) . ... Before and after photos of the galaxy M82 showing the appearance of a brand new 11.7 magnitude supernova. ... The new supernova lies in M82, a starburst galaxy located within the constellation Ursa Major. ... M82 is a bright, striking edge-on spiral galaxy bright enough to see in binoculars. ...

... Astrophysics Group . ... I: declination > 80ТА, 0 h < right ascension < 24 h . ... 1985, MNRAS, 217, 717. ... V: 48ТА < declination < 68ТА, 01 h 34 m < right ascension < 6 h 14 m and 17 h 16 m < right ascension < 20 h 24 m . ... VI: 30ТА < declination < 51ТА, 0 h < right ascension < 09 h 05 m and 22 h 35 m < right ascension < 24 h . ... The published papers contain source lists and images on microfiche. Versions of these papers with the lists and images on paper are available on request from MRAO. ...