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Mercury's May Transit: Why do we care?
On Monday, Mercury passed between us and the Sun, blocking out some of ... of the solar system. The first transit observed was one of Mercury, in fact, early in the 17th century. Haley was the ... to work out the relative difference between the earth to mercury and, therefore, from mercury to the sun and, ...
The Pluto debate: planet or dwarf planet?
... My very easy method just speeds up naming planets - Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune ...
How old are the planets?
... someone who is 30 in earth terms is also 120 years on Mercury or 2 1/2 on Jupiter, so we’ll say earth years. ...