... Planets . ... Earth Satellites . ... Monthly Sky Notes . ... As the sun sets in the west each evening, Jupiter, the largest planet in our Solar System, is rising in the east in the constellation of Aries, where it is visible throughout the night setting just before sunrise. ... On 28 October the Earth comes between the Sun and Jupiter, in opposition, meaning as the Sun sets in the sky Jupiter will rise. ... Also this month rising into the sky in the early hours of the morning is Mars the Red planet....

Supernova 2009js in NGC 918 . This page is devoted to information on Supernova 2009js in NGC 918 . Basic information on this SN, including the last reported brightness, on this Supernova can be found on the main page . Information on the original web pages for many of these images can be found on the updates and links web pages. Discovered independently by Lick Observatory Supernova Search (USA) and Koichi Itagaki (Japan). ... 2009/10/11.44 . 17.2 . ... Joseph Brimacombe . ...

... 2015 October 17 . Bright Spiral Galaxy M81 . ... This superbly detailed image reveals M81's bright yellow nucleus, blue spiral arms, tell tale pinkish star forming regions, and sweeping cosmic dust lanes with a scale comparable to the Milky Way. Hinting at a disorderly past, a remarkable dust lane actually runs straight through the disk, to the left of the galactic center, contrary to M81's other prominent spiral features . ... About APOD | ...

... Mars to Appear Normal this August . ... October is the best month to see Mars this year. ... As Earth catches up to Mars in their respective orbits around the Sun, Mars will keep rising earlier in the night. On 2005 October 30, Earth will have caught up to Mars and the planets will be the nearest to each other in their orbits -- this time around. On October 30, Mars will be nearly opposite to the Sun, rise at sunset, set at sunrise, and appear highest and brightest around midnight. ...

... October 9, 1997 . Hale-Bopp and the North American Nebula . ... Explanation: Comet Hale-Bopp 's recent encounter with the inner Solar System allowed many breath-taking pictures. Above, Comet Hale-Bopp was photographed on March 8th in the constellation of Cygnus . ... The North American Nebula is about 1500 light years away, much farther than the comet, which was about 8 light minutes away. ... About APOD > . ...

... Warped passages: Thursday 16 October 2008 . ... Catch a Falling Star: Thursday 9 October . A stronomy Ireland Colm J. Cannon Memorial lecture: " Searching for Planets Around Other Stars - From Galway " by Gregg Hallinan, at 8 pm, Monday 13 October, in the Physics Building, Trinity College Dublin. ... The techniques used to detect these planets requires the use of very sensitive and expensive equipment. ... Tuesday, 7 October 2008 23:23 . International Year of Astronomy, Ireland National Node . ...

... Abstract . ... An Efficient ACS Coronagraphic Survey for Debris Disks around Nearby Stars . ... The Dynamic State of the Dwarf Galaxy Rich Canes Venatici I Region . ... High-resolution HST image of the face-on debris disk in the G2 dwarf, HD 107146 . ... Simulations of a nearby dwarf galaxy, a nearby giant galaxy and a distant giant galaxy; note that the last is similar in angular size to the dwarf, but has a much smoother brightness distribution (simulations from Ned Wright's ABC of distances . ...

Aboriginal and Torres Strait Islander people developed complex knowledge systems around the sun, moon, and stars. Stellar positions and properties (such as declination, colour, brightness, and scintillation) were important for navigation, calendars, economics, and time-keeping. Transient astronomical phenomena (including comets, meteors, eclipses, and aurorae) reinforced sacred law and cultural practices and served as a moral charter. ...