How big is Rosetta's comet?
Pretty darn big, I'd say.
Is a comet on a collision course with Mars?
There is an outside chance that a newly discovered comet might be on a collision course with Mars. Astronomers are still determining the trajectory of the comet, named C/2013 A1 (Siding Spring), but at the ...
Amazing new photo of Rosetta comet
As the ESA's Rosetta spacecraft closes to within 1000 km of Comet 67P/Churyumov-Gerasimenko, the Rosetta science team has released a new image and made the first temperature measurements of the comet's core. ...
Rosetta sets sights on destination comet
(Phys.org) —ESA's Rosetta spacecraft has caught a first glimpse of its destination comet since waking up from deep-space hibernation on 20 January.
Comet ISON is confirmed dead after brush with Sun
A comet that grabbed attention worldwide for being likened to a massive snowball in space did not survive its brush with the Sun last week, NASA confirmed on Tuesday.
Comet-probing robot to wake from hibernation
A fridge-sized robot lab hurtling through the Solar System aboard a European probe is about to wake from hibernation and prepare for the first-ever landing by a spacecraft on a comet.
Rosetta comet comes alive
A spacecraft from Earth is about to do something no spacecraft has ever done before: orbit a comet and land on its surface.
Hubble brings faraway comet into view
(Phys.org) —The NASA Hubble Space Telescope has given astronomers their clearest view yet of Comet ISON, a newly-discovered sun grazer comet that may light up the sky later this year, or come so close to ...
Comet at dawn
(Phys.org) —Soon after its discovery in late summer of last year, the media hyped ISON to be the comet of the millennium. At the time when it is expected to come closest to the Sun, on 28 November 2013, ...
Major meteor shower could delight N. America May 23-24
Skywatchers in the United States and Canada could see a one-of-a-kind meteor shower late Friday night and early Saturday, astronomers say.
Sun-grazing comet ISON likely broke up (Update)
Once billed as the comet of the century, Comet ISON apparently was no match for the sun.
Simulations unravel mysteries of 2009 Jupiter impact
Collision course? A comet heads for Mars
Over the years, the spacefaring nations of Earth have sent dozens of probes and rovers to explore Mars. Today there are three active satellites circling the red planet while two rovers, Opportunity and Curiosity, ...
Earth's oldest known impact crater found in Greenland
A 100 kilometre-wide crater has been found in Greenland, the result of a massive asteroid or comet impact a billion years before any other known collision on Earth.