Cover Stories:

• 250 million years ago, did an asteroid nearly end life on earth?

• How to observe the sun

• Is the Calabi-Yau manifold the shape of the universe? Cosmic inflation may be key to proving the cosmos has six extra dimensions

• How molecules in space seed life in the galaxy

• Spot spring's best globular clusters

• Capture images of our local star

• Obsession's new 18 inch scope tested

• How historic observatories will survive

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