... Dione's icy surface includes heavily cratered terrain, moderately cratered plains, lightly cratered plains, and whispy material. The heavily cratered terrain has numerous craters greater than 100 kilometers in diameter. ... Much of the heavily cratered terrain is located on the trailing hemisphere , with the less cratered plains area existing on the leading hemisphere . ... Because Dione is relatively small, an impact causing a 35 kilometer (21 mile) crater could have spun the satellite. ...

... Dione's icy surface includes heavily cratered terrain, moderately cratered plains, lightly cratered plains, and whispy material. The heavily cratered terrain has numerous craters greater than 100 kilometers in diameter. ... Much of the heavily cratered terrain is located on the trailing hemisphere , with the less cratered plains area existing on the leading hemisphere . ... Because Dione is relatively small, an impact causing a 35 kilometer (21 mile) crater could have spun the satellite. ...

Discover the cosmos! ... 2015 November 25 . Unusual Pits Discovered on Pluto . ... Explanation: Why are there unusual pits on Pluto? The indentations were discovered during the New Horizons spacecraft's flyby of the dwarf planet in July. The largest pits span a kilometer across and dip tens of meters into a lake of frozen nitrogen , a lake that sprawls across Sputnik Planum , part of the famous light-colored heart-shaped region named Tombaugh Regio . ... About APOD | ...

... Unusual Silica Rich Soil Discovered on Mars . ... NASA Web Site Statements, Warnings, and Disclaimers . NASA Official: Jay Norris. ... A service of: LHEA at NASA / GSFC . ... Publications with keywords: Mars - Martian Rover . Publications with words: Mars - Martian Rover . ... Mars Rover Races to Survive . Mars in View . Victoria Crater on Mars . A Hole in Mars Close Up . Inside Victoria Crater on Mars . A Path Into Victoria Crater on Mars . ...

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 . ...

A team using CSIRO 's Parkes radio telescope has just found the thousandth pulsar known to science. ... This is thanks to the power of a new instrument on the telescope, the multibeam system , which has slashed the time it takes to scan the sky," said co-leader of the pulsar team, CSIRO's Dr Dick Manchester . ... There are many different types of pulsar, and we have only a few examples of some types," said Dr Manchester. ... E-mail: rmanches@atnf.csiro.au . ... e-mail: hsim@atnf.csiro.au . ...

Astronotes Armagh Planetarium's Stellar Blog! ... Comets and Asteroids . ... Space Flight . ... November . ... By admin September 26, 2012 Posted in: Comets and Asteroids . Comet ISON is revealed.( ... Comet ISON.'s orbit and position on 25 September 2012.( ... The comet€а will reach its closest point to the Sun, perihelion in late November 2013.Then it is expected to whizz around the Sun a mere 1.1 million km above its surface making Comet ISON one of that class of comets called€а Sungrazers. ...