Answer / Mahaveer Prasad

Some stars have had time to die since the universe began because the universe is approximately 13.8 billion years old and some stars can live for billions of years.

What are asteroids like?

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How have some stars had time to die since the universe began?

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Rounded off to the nearest trillion, how many miles is in a light year?

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Which other galaxy is similar to the milky way?

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Explain how do clouds form?

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Describe how are clouds formed?

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What substance is responsible for neptunes blue-green color?

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The work of this harvard college observatory scientist made possible the first accurate determination of extragalactic distances by what is often called henriettas law?

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When did solar system come into existence?

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Explain how old is this universe?

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Which was the first space rocket to hit the moon?

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Why these stars are called novae?

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