How many moons does Earth have?

  • 7 Replies
  • 3535 Views

0 Members and 1 Guest are viewing this topic.

*

katie

  • Guest
How many moons does Earth have?
« on: 30/01/2009 04:30:02 »
katie asked the Naked Scientists:
   
A while ago I saw on QI that the earth has more than one moon -
if this is the case, why does everywhere else seem to say that the earth has only one moon- and why can't we see the other moons as easily?

cheers again for your brilliant show

k

What do you think?

*

Offline Chemistry4me

  • Neilep Level Member
  • ******
  • 7709
    • View Profile
How many moons does Earth have?
« Reply #1 on: 30/01/2009 04:47:10 »
Quote
Earth has a second moon, of sorts, and could have many others, according to three astronomers who did calculations to describe orbital motions at gravitational balance points in space that temporarily pull asteroids into bizarre orbits near our planet.

The 3-mile-wide (5-km) satellite, which takes 770 years to complete a horseshoe-shaped orbit around Earth, is called Cruithne and will remain in a suspended state around Earth for at least 5,000 years.

http://www.space.com/scienceastronomy/solarsystem/second_moon_991029.html

*

Offline demadone

  • Sr. Member
  • ****
  • 112
    • View Profile
How many moons does Earth have?
« Reply #2 on: 30/01/2009 09:32:12 »
Mostly it depends on the shape. If these moons were round and beautiful, everyone would accept them.

*

Offline yor_on

  • Naked Science Forum GOD!
  • *******
  • 12188
  • (Ah, yes:) *a table is always good to hide under*
    • View Profile
How many moons does Earth have?
« Reply #3 on: 30/01/2009 09:34:26 »
As we relatively seen are the center of all expansion, they all are 'moons'.
Some rather big though, and not all have been informed of their new status (yet).

But I expect that to be rectified:)
"BOMB DISPOSAL EXPERT. If you see me running, try to keep up."

*

Offline Chemistry4me

  • Neilep Level Member
  • ******
  • 7709
    • View Profile
How many moons does Earth have?
« Reply #4 on: 30/01/2009 09:37:48 »
Moon anybody?

*

Offline Lynda

  • Full Member
  • ***
  • 84
    • View Profile
How many moons does Earth have?
« Reply #5 on: 30/01/2009 09:52:51 »
Have any astronomers managed to take a photo of this second "moon"?    I am intrigued!
LYNDA
Only when the last tree has died & the last river has been poisoned & the last fish has been caught will we realise that we can not eat money

*

Offline yor_on

  • Naked Science Forum GOD!
  • *******
  • 12188
  • (Ah, yes:) *a table is always good to hide under*
    • View Profile
How many moons does Earth have?
« Reply #6 on: 31/01/2009 00:12:59 »
"BOMB DISPOSAL EXPERT. If you see me running, try to keep up."

*

Offline DoctorBeaver

  • Naked Science Forum GOD!
  • *******
  • 12656
  • A stitch in time would have confused Einstein.
    • View Profile
How many moons does Earth have?
« Reply #7 on: 31/01/2009 14:03:11 »
Apparently 5 have been discovered
Fledgling science site at http://www.sciencefile.org/SF/content/view/54/98/ needs members and original articles. If you can help, please join.