Mercury

Size: About 1/3 as wide as the Earth

Number of moons: 0

Temperature: -279°F to 800°F. So REALLY cold or REALLY hot depending on if you're in the shade or not!

Mercury is a ball of rock.

Mercury is the planet closest to the Sun. Its grey surface is covered with craters. It would not be very nice to live on Mercury, because it is either REALLY hot or REALLY cold.

[next page]
The source of this material is Windows to the Universe, at http://windows2universe.org/ from the National Earth Science Teachers Association (NESTA). The Website was developed in part with the support of UCAR and NCAR, where it resided from 2000 - 2010. © 2010 National Earth Science Teachers Association. Windows to the Universe® is a registered trademark of NESTA. All Rights Reserved. Site policies and disclaimer.