A supermassive black hole - with a mass of perhaps a billion suns - could be ejected from its galaxy under special conditions when two black holes merge.
Mars' tiny moon Phobos has created a big stir among astronomers with the fly-bys of the Mars Express Spacecraft of the European Space Agency in early 2010.
"The Hubble Space Telescope has literally changed our view of the universe," said NASA astrophysicist Ed Weiler. April 2010 marks its 20th anniversary.
This event on the sun can knock out satellites and interfere with earthly communications. It can result in magnificent auroras - the famous northern or southern lights. Be alert in the coming days ...
There's a longstanding mystery about the craters on Venus. There aren't enough of them. Could active volcanoes be wiping them from the planet's surface?
Astronauts returning from the zero gravity of space often have trouble with balance. Jacob Bloomberg wants to speed up their transition to earthly gravity.