Solar eclipse from Deimos
Deimos would be an interesting place for observing an eclipse of the Sun by Mars. A brilliant cerulean crescent heralds the emergence of the Sun from behind the limb of of Mars itself. The crescent is created by sunlight scattering through Mars' dust-laden atmosphere. While the Sun itself is not yet visible, its corona of superheated gas extends several solar diameters beyond Mars' horizon. This is the same solar corona that becomes visible briefly during a total solar eclipse on Earth.
The Earth can be seen in this image as a pale blue dot to the left of the crescent. To the lower right is the planet Mercury, and down and right a little further is the planet Venus. While Venus orbits closer to the Sun than the Earth, the relative positions of the planets in their orbits make the Earth appear deceptively closer to the Sun from this vantage point.
Copyright © Walter B. Myers. All rights reserved.
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