What Is an Exoplanet and Why Do Astronomers Have Interest in Them?
What Is an Exoplanet and Why Do Astronomers Have Interest in Them? An exoplanet or extrasolar planet is a planet that orbits a star other than the Sun. To date,...
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How Are Stars Formed?
A star like our sun is born inside a huge cloud of gas and dust. A globe of space matter grows as it sweeps up surrounding matter by gravitational attraction. As the...
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Why Do Stars Shine Only at Night?
Why Do Stars Shine Only at Night? Though stars seem to disappear when daylight comes, there are really stars in the sky all day, and their light keeps streaming to...
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How Many Stars Are There in the Universe?
How Many Stars Are There in the Universe? No one knows how many stars there are in the universe. We cannot see all the stars, much less count them. It is estimated that...
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What Is a Black Hole in Space?
One of the strangest mysteries of outer space is a “black hole.” A black hole is a place in space where gravity is very strong as the matter is squeezed into a tiny...
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