Venus Behaves Like a Comet

Venus Behaves Like a Comet

  ESA’s Venus Express has made unique observations of Venus during a period of reduced solar wind pressure, discovering that the planet’s ionosphere balloons out like a comet’s tail on its night-side. The change in ionosphere of Venus during normal solar wind conditions (left) and reduced solar wind activity (right), as observed by ESA’s Venus Express [continue reading]

Anne's Picture of the Day: Emission Nebula IC 410

Anne’s Picture of the Day: Emission Nebula IC 410

January 29, 2012 IC 410, a nebula with tadpoles Image Credit & Copyright: J-P Metsävainio (http://astroanarchy.zenfolio.com) IC 410 is a faint and dusty emission nebula of more than 100 light-years across, located near the Flaming Star Nebula (IC 405) in a large star-forming (HII) region about 12,000 light-years away from Earth in the northern constellation [continue reading]

 When the Lights Go Out in a Galaxy

When the Lights Go Out in a Galaxy

  The further away you look, the further back in time you see. Astronomers use this fact to study the evolution of the Universe by looking at nearby and more distant galaxies and comparing their features. Hubble is particularly well suited for this type of work because of its extremely high resolution and its position [continue reading]

Possible Birth Of A Quasar Witnessed

Possible Birth Of A Quasar Witnessed

  Sighting may help improve understanding of the early Universe   Scientists in Australia believe they’ve identified a quasar in the process of lighting up, for the very first time. This discovery could help scientists answer lingering questions about how these exceptionally bright celestial bodies form, and how they helped the ancient Universe shape today’s galaxies. [continue reading]

Anne's Picture of the Day: Starburst Galaxy NGC 1792

Anne’s Picture of the Day: Starburst Galaxy NGC 1792

January 28, 2013 NGC 1792, a starburst galaxy in Columba Image Credit: ESO/P. Barthel NGC 1792 is a barred spiral galaxy, located about 43 million light-years away from Earth in the south-western corner of the small southern constellation of Columba (the Dove), while it is moving away from us at 1211 – 1222 kilometers per second. It [continue reading]

A Big Piece to the Solar Corona Puzzle Solved

A Big Piece to the Solar Corona Puzzle Solved

  The Sun’s visible surface, or photosphere, is 10,000 degrees Fahrenheit. As you move outward from it, you pass through a tenuous layer of hot, ionized gas or plasma called the corona. The corona is familiar to anyone who has seen a total solar eclipse, since it glimmers ghostly white around the hidden Sun. This [continue reading]