News tagged with sun

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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?

Feb 24, 2015
3.5 / 5 (71) 31

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 ...

Feb 19, 2015
5 / 5 (3) 0

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 ...

Feb 17, 2015
4 / 5 (4) 0

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 ...

Feb 12, 2015
4.5 / 5 (16) 8

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 ...

Feb 10, 2015
5 / 5 (10) 2

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 ...

Feb 09, 2015
4.8 / 5 (6) 0

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.

Feb 09, 2015
4.8 / 5 (94) 8

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.

Feb 06, 2015
5 / 5 (16) 0

The ages of sun-like stars

The mass of a star is perhaps its most significant feature. It determines how brightly it shines (a star ten times more massive than the Sun will, during its normal lifetime, shine about forty million times ...

Feb 06, 2015
4.9 / 5 (16) 2