Astronomers found 96 new star clusters in our Milky Way - the first time so many have been found at once. Each spans light-years and contains 10-20 stars.
On August 5, 2011, NASA launched the Juno spacecraft on a $1.1 billion mission to Jupiter. The craft will orbit for a year and sweep near Jupiter's cloudtops.
Curiosity has more than twice the length and and five times the weight of previous Mars rovers. It's scheduled to launch in 2011 and arrive in August 2012.
Researchers at the University of Maryland just tried to simulate the the Big Crunch - the end of the universe. Who knew all you needed was gold and plastic?
Mysterious volcanic domes - rich in silica - have been found on the far side of the moon. Their origin remains enigmatic. Read more about mystery moon domes.
On July 21, just 21 minutes before Atlantis' final deorbit burn, astrophotographer Thierry Legault captured this image of the shuttle crossing in front of the sun.
The cloud of water vapor - 140 trillion times more water than in Earth's oceans - is 12 billion light-years away and surrounds the black hole of quasar.