#6: Phoenix Lander Strikes Ice on Mars
Finally, positive confirmation of what we long thought and hoped for
#13: China Takes Its First Space Walk
A nation delights in its pioneering venture.
#22: Mercury Reveals Its Secrets
The planet comes into focus during NASA's first visit in 33 years.
#23: Black Holes Birth Baby Stars
Computer simulations reveal the source of mystery constellations.
#27: Astronomers Spy the Youngest Planet Ever Found
The latest, newest protoplanet is a "dusty, rocky, gaseous lump."
#40: The First Known Binary Black Hole System
One of the most massive things in the universe turns out to have a little buddy.
#60: Mars Became Lopsided After Massive Asteroid Collision
After 30 years, the debate over the red planet's shape may be over.
#78: The Galaxy that Spins a Giant Magnetic Web
This "fiery spiderweb" uses magnetic fields to survive tough storms.
#95: Organic Matter Found in Saturn's Mystery Moon
Icy Jets from the planet's sixth-largest moon contain primitive components of life.
#97: All-Powerful Astronomers Turn "Dwarf Planets" Into "Plutoids"
Faced with an outcry over ungainly titles, the IAU comes up with a better alternative.
#99: Jupiter Grows (and Loses) a New Spot
The massive planet passed behind the sun and arrived with a brand new decoration.