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Windblown NGC 3199
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In Wolf's Cave
The mysterious blue reflection nebula found in catalogs as VdB 152 or Ced 201 really is very faint.
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Astronomy Picture of the Day: Lunar Eclipse over Cologne Cathedral
Why would a bright full Moon suddenly become dark? Because it entered the shadow of the Earth.
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Astronomy Picture of the Day: Equinox: Analemma over the Callanish Stones
Does the Sun return to the same spot on the sky every day at the same time? No.
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Astronomy Picture of the Day: Lunations
Our Moon's appearance changes nightly. As the Moon orbits the Earth, the half illuminated by the Sun first becomes increasingly visible, then decreasingly visible.
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Astronomy Picture of the Day: Road to Mars
What's that light at the end of the road? Mars.
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Astronomy Picture of the Day: Mars Engulfed
What's happened to Mars? In 2001, Mars underwent a tremendous planet-wide dust storm
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Howling wolf nebula
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