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Comet making closest approach ever of Earth

astronomy northern hemisphere pan-starrs oort cloud

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#1 Hum

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Posted 06 March 2013 - 14:33

CAPE CANAVERAL, FL (AP) — A recently discovered comet is closer than it's ever been to Earth, and stargazers in the Northern Hemisphere finally get to see it.

Called Pan-STARRS, the comet passed within 100 million miles of Earth on Tuesday, its closest approach in its first-ever cruise through the inner solar system. The ice ball will get even nearer the sun this weekend — just 28 million miles from the sun and within the orbit of Mercury.

The comet has been visible for weeks from the Southern Hemisphere. Now the top half of the world gets a glimpse as well.

The best viewing days should be next Tuesday and Wednesday, when Pan-STARRS appears next to a crescent moon at dusk in the western sky. Until then, glare from the sun will obscure the comet.

California astronomer Tony Phillips said the comet's proximity to the moon will make it easier for novice sky watchers to find it. Binoculars likely will be needed for the best viewing, he said, warning onlookers to avoid pointing them at the setting sun.

"Wait until the sun is fully below the horizon to scan for the comet in the darkening twilight," Phillips advised in an email sent from his home and observatory in the Sierra Nevada mountains.

Pan-STARRS' name is actually an acronym for the Hawaiian telescope used to spot it two years ago: the Panoramic Survey Telescope and Rapid Response System. The volcano-top telescope is on constant prowl for dangerous asteroids and comets that might be headed our way.

Thought to be billions of years old, the comet originated in the distant Oort cloud — a cloud of icy bodies well beyond the orbits of Neptune and Pluto — and somehow got propelled toward the inner solar system. It's never passed by Earth before, Phillips said.

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#2 spacer

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Posted 06 March 2013 - 14:51

Very cool. I'll definitely look for it when I'm leaving work.

#3 OP Hum

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Posted 06 March 2013 - 15:19

Always wondered why the comets don't just melt (or get pulled in) when they pass near the sun.

#4 Dot Matrix

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Posted 06 March 2013 - 15:36

Always wondered why the comets don't just melt (or get pulled in) when they pass near the sun.


They're not pure ice.

#5 +warwagon

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Posted 06 March 2013 - 15:41

Wait....ICE??? ......That means...WATER!!!! ....Water in outer space means possibility of Aliens!

#6 NoPanShabuShabu

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Posted 06 March 2013 - 15:59

Hum: It's because they're big and tak a long time to melt as well as also having some rock. The tail of the comet is the evaporating stuff, eventually it would all go away to pretty much nothing.

Warwagon: Ice is not necessarily the same thing as water ice. Anyway, the proof that there are aliens is the great big UFO that's probably flying along side it ready to pick us up.

#7 OP Hum

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Posted 06 March 2013 - 16:12

Water in outer space means possibility of Aliens!


Aliens are a certainty.

#8 -T-

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Posted 06 March 2013 - 16:23

Wait, this is visible in the southern hemisphere. I gotta get my telescope out again

#9 Crisp

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Posted 06 March 2013 - 16:25

Aliens are a certainty.


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:alien:

#10 DocM

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Posted 06 March 2013 - 20:16

Comet Pan-STARRS from Bridgetown, W. Australia on March 3rd. ISO 1000, f/4, 200 mm, 4 seconds. Credit: Jim Gifford.

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#11 Growled

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Posted 07 March 2013 - 01:35

^ That's really cool. I wish we could see it like that here.

#12 The_Observer

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Posted 07 March 2013 - 01:40

pretty amazing that we have something like this passing past! will be looking for it tonight!



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