Pretty darn big, I'd say. The illustration above shows the relative scale of the comet that ESA's Rosetta and Philae…
It's no surprise that there is a lot of water in comets. The "dirty snowballs" (or dusty ice-balls, more accurately)…
Host: Fraser Cain (@fcain) Guests: Alessondra Springmann (@sondy), Brian Koberlein (@briankoberlein, briankoberlein.com), Nicole Gugliucci (cosmoquest.org / @noisyastronomer) (more…)
Wow! This image shows the target comet for the Rosetta mission starting to develop a tail. This bodes well for…
Philae is awake... and taking pictures! This image, acquired last night with the lander's CIVA (Comet nucleus Infrared and Visible…
Hang onto your space helmets. With a few moves of the mouse, you can now follow the European Rosetta mission…
Little Philae is awake! ESA sent a wake-up call to the 100-kg (220-lb) lander riding aboard the Rosetta spacecraft this…
As Rosetta limbers up for its close-up encounter with a comet, we have visual confirmation that it's on the right…
After four months behind the sun from Earth's perspective, comet 67P/Churyumov-Gerasimenko is back in view -- and brighter than ever! New…
The European Space Agency asked for help in waking up the Rosetta spacecraft from 31 months of deep-space hibernation, and…