Let's talk comets

View previous topic View next topic Go down

Let's talk comets

Post  Yakima Canutt on Tue Mar 31, 2015 6:07 am

A comet is an icy body that releases gas or dust. They are often compared to dirty snowballs, though recent research has led some scientists to call them snowy dirtballs. Comets contain dust, ice, carbon dioxide, ammonia, methane and more. Astronomers think comets are leftovers from the gas, dust, ice and rocks that initially formed the solar system about 4.6 billion years ago.

Some researchers think comets might have originally brought some of the water and organic molecules to Earth that now make up life here. To research this hypothesis, the Rosetta mission, which landed a probe on a comet on Nov. 12, 2014, is studying its nucleus and environment, observing how it changes as it approaches the sun.

Comets orbit the sun, but most are believed to inhabit in an area known as the Oort Cloud, far beyond the orbit of Pluto. Occasionally a comet streaks through the inner solar system; some do so regularly, some only once every few centuries. Many people have never seen a comet, but those who have won't easily forget the celestial show.


Yakima Canutt

Posts : 7861
Join date : 2011-04-11

Back to top Go down

Re: Let's talk comets

Post  pinhedz on Wed Apr 01, 2015 11:37 am

Yakima Canutt wrote:Astronomers think comets are leftovers from the gas, dust, ice and rocks that initially formed the solar system about 4.6 billion years ago.

I would have said that that some "some" astronomers think that.

pinhedz
Schrödinger's Hepcat

Posts : 11538
Join date : 2011-04-11
Location : DC

http://www.balalaika.org/

Back to top Go down

Re: Let's talk comets

Post  Yakima Canutt on Thu Apr 02, 2015 4:36 pm

was implied

Yakima Canutt

Posts : 7861
Join date : 2011-04-11

Back to top Go down

Re: Let's talk comets

Post  Sponsored content Today at 2:11 pm


Sponsored content


Back to top Go down

View previous topic View next topic Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum