Planets not to scale. When is the 7 planet alignment ... Venus is visible for only a few months at a time when it reaches its greatest separation from the sun. Mercury, which takes 88 days ...

Once, a very long time ago, a massive asteroid hit the Earth and wiped out the dinosaurs. In addition to functionally ...

The hardest planet to see will be Saturn because it moves so close to the sun and you will need to know the exact time for your position. The last time the seven planets aligned was on April 8 ...

After Friday's spectacle, a "planet parade" of this size won't appear in the night sky for several years, experts say.