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Posts tagged star

August 10, 2016


an image of a solar flare

Could Our Sun Turn Deadly?

It may sound far-fetched, but humanity faces a major potential danger: someday, there might be a gigantic explosion on the sun.

April 14, 2016


This sparkling jumble is Messier 5 — a globular cluster consisting of hundreds of thousands of stars bound together by their collective gravity. But Messier 5 is no normal globular cluster. At 13 billion years old it is incredibly old, dating back to close to the beginning of the Universe, which is some 13.8 billion years of age. It is also one of the biggest clusters known, and at only 24 500 light-years away, it is no wonder that Messier 5 is a popular site for astronomers to train their telescopes on. Messier 5 also presents a puzzle. Stars in globular clusters grow old and wise together. So Messier 5 should, by now, consist of old, low-mass red giants and other ancient stars. But it is actually teeming with young blue stars known as blue stragglers. These incongruous stars spring to life when stars collide, or rip material from one another.

The Mystery of KIC8462852

The Kepler telescope has detected a large entity blocking light from a distant star called KIC8462852.

September 19, 2011


Gold bar and coins.

Gold’s Explosive Genesis

Everyone knows what gold is, but the commodity's stellar origins might come as a bit of a surprise.

January 21, 2011


A blackhole in space

What Is A Black Hole?

Black holes were always the most dangerous thing when traveling through space in science fiction shows. What are black holes and how do they form?

October 30, 2008


High above Earth's atmosphere

The Habitable Zone

Could there be life on other planets? Given how unfathomably large the universe is, there very well could be.

July 6, 2008


Vibrant sunset over ocean

What Makes the Sun Shine?

What makes the sun shine? It's a question we rarely give much thought. However, there is a scientific explanation for this commonplace phenomenon.

April 22, 2008


Orange sunset over plain

What’s in the Sun?

The physicist Artur Eddington once said he hoped one day science would have advanced far enough to understand "so simple a thing as a star."

January 26, 2007


evening star and moon above a mountain range at sunrise

Evening Star

Star light, star bright, the first star I see tonight... What is this legendary star? Is it even a star at all?

January 2, 2006



You’re out on a clear, starry night with your best friend, looking for shooting stars. Look, there’s one, your friend shouts, but by the time you look, it’s gone. There’s another, she cries. Too late, you missed it. Then one comes along that seems to just amble across the sky, nice and slow. Why is it that some shooting stars are so fast and others are much slower? Learn more on this Moment of Science.

November 28, 2005



Ancient people believed comets were omens. Sometimes they were thought to signal the fall of empires, other times the birth of kings. Even today, when we’re all supposed to be much more intelligent, people do crazy things when comets pass by. Learn more on this Moment of Science.

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