Oort cloud

Comet flyby of Mars changed chemistry of atmosphere: NASA

Last month, an exotic deep space comet flew by Mars and unleashed an unexpectedly strong meteor shower that briefly changed the chemistry of the Red Planet`s upper atmosphere, NASA said Friday.

Nov 08, 2014, 03:19 AM IST

Jury still out on fate of Comet ISON post `fiery` sun encounter

Scientists are working to determine and to understand the fate of Comet ISON as it moves away from the sun.

Dec 03, 2013, 11:34 AM IST

`Zombie` comet ISON may be back from the dead

A smaller, paler version of Comet ISON may have survived incineration in the sun`s corona and may be brightening, scientists said on Friday.

Nov 30, 2013, 10:23 AM IST

Incoming comet ISON heading for close encounter with sun

A comet is heading for a close encounter with the sun later this month, and if it is not vaporized or torn apart, it should be visible to the naked eye in December.

Nov 12, 2013, 10:45 AM IST

Alien comets were stolen by Sun 4.5bn yrs ago

Computer simulations have shown that the early Sun could have stolen comets from neighboring newborn stars 4.5 billion years ago.

Nov 29, 2010, 16:34 PM IST