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Kamikaze comet loses its head

Like coins, most comet have both heads and tails. Occasionally, during a close passage of the Sun, a comet's head will be greatly diminished yet still retain a classic cometary outline. Rarely are we left ...

dateMar 03, 2015 in Space Exploration
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Could there be another planet behind the sun?

If you've read your share of sci-fi, and I know you have, you've read stories about another Earth-sized planet orbiting on the other side of the Solar System, blocked by the Sun. Could it really be there?

dateFeb 24, 2015 in Astronomy
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Stanford pair helping predict solar storms

Life as a forecaster is not easy. Just ask National Weather Service forecasters who misjudged how a recent winter storm would impact the Big Apple. Now imagine trying to predict weather activity on a burning ...

dateFeb 19, 2015 in Space Exploration
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Are astronauts really weightless?

Hey look! It's a montage of adorable astronauts engaging in hilarious space stuff in zero gravity. Look at them throwing bananas, playing Bowie songs, drinking floating juice balls, and generally having a ...

dateFeb 17, 2015 in Space Exploration
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Image: Giant filament seen on the sun

A dark, snaking line across the lower half of the sun in this Feb. 10, 2015 image from NASA's Solar Dynamics Observatory (SDO) shows a filament of solar material hovering above the sun's surface. SDO shows ...

dateFeb 12, 2015 in Space Exploration
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Do stars move?

We know that Earth is not the center of the universe—let alone the Solar System—but looking at the sky, it's easy to get confused. Stars appear to be rising and setting, as well as the planets, Moon and ...

dateFeb 10, 2015 in Astronomy
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How do we study the Sun?

A quick think about optical astronomy would have you imagine that most of it takes place at night. Isn't that when the stars and galaxies come out to play? Well, that assumption makes at least one glaring ...

dateFeb 09, 2015 in Space Exploration
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How big is the biggest star we have ever found?

The universe is such a big place that it is easy to get baffled by the measurements that astronomers make. The size of UY Scuti, possibly one of the largest stars we have observed to date, is certainly baffling.

dateFeb 09, 2015 in Astronomy
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What is a Wolf-Rayet star?

Wolf-Rayet stars represent a final burst of activity before a huge star begins to die. These stars, which are at least 20 times more massive than the Sun, "live fast and die hard", according to NASA.

dateFeb 06, 2015 in Astronomy
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