Lunar Eclipse

Lunar Eclipse, originally uploaded by Grzesiek:.

Tag search ‘orange’. I’ve already posted an image of the moon but I thought this was definitely worth adding in its own right – taken when the earth is between the sun and the moon.

In case you didn’t see it first time round, the other lunar post has an interesting story attached to it about the new space race to mine Helium-3 on the moon.

For this photo the author provides following notes:

A total lunar eclipse shot on 3rd of March 2007 in Saarbruecken. The part of the moon in the shadow of earth is red-orange because of earth’s atmosphere. The umbral shadow is slightly bluish and the rim gets very bright, because the greatest eclipse is almost over.

Some lunar factoids I found in Friday’s London Metro:

  • It is believed the moon was created when a rock the size of Mars slammed into Earth shortly after the solar system began forming about 4.5 billion years ago
  • The moon’s heavily cratered surface is the result of intense pummelling by space rocks between 4.1 billion and 3.8 billion years ago
  • The moon is not spherical but is actually egg-shaped – its centre of mass is not at the geometric centre of the satellite but about 2km off-centre
  • Some of Earth’s rotational energy is stolen by the moon, causing our planet to slow down by about 1.5 milliseconds every century
  • Using this stolen energy, the moon is moving away from us by 4 cm each year. When it formed, the moon was about 22,530 km from Earth, now it is more than 450,000 km away
  • It is thought that, like Earth, the moon has a core that is hot and perhaps partially molten – but it is tiny, only accounting for between two and four per cent of the moon’s mass (Earth’s core makes up about 30 per cent of its mass)

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