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What happens when a big star collapses?

The outer layers of the star will be ejected into space in a supernova explosion, leaving behind a collapsed star called a neutron star. Ordinary matter, the kind that we and everything around us is made of, is mostly empty. It is made up of atoms, which are made of electrons, [112] protons, and neutrons.

What happens when a star stops fusing hydrogen in the core?

Once a star has exhausted its supply of hydrogen in its core, leaving nothing but helium, the outward force created by fusion starts to decrease and the star can no longer maintain equilibrium. The force of gravity becomes greater than the force from internal pressure and the star begins to collapse.

What would happen if a star blew up?

When a star like the Sun dies, it casts its outer layers into space, leaving its hot, dense core to cool over the eons. But some other types of stars expire with titanic explosions, called supernovae. A supernova can shine as brightly as an entire galaxy of billions of “normal” stars.

Do you die instantly in an explosion?

Anyone at or near the center of a nuclear explosion would be killed immediately by the fireball, searing radiation or the blast wave. Otherwise, what you should do depends on how far away you are from the explosion.

Will we see a supernova in 2022?

Catching a supernova would be a rare and amazing sight: such explosions can shine more brightly than an entire galaxy. Molnar thought he’d found two stars about to explode as a red nova in 2017 — the system KIC 9832227 — which he predicted would happen around 2022.

Can Betelgeuse kill us?

No. Whenever Betelgeuse does blow up, our planet Earth is too far away for this explosion to harm, much less destroy, life on Earth. Astrophysicists say we’d have to be within 50 light-years of a supernova for it to harm us. Betelgeuse is nearly 10 times this distance.

Would a supernova kill us?

A supernova is a star explosion – destructive on a scale almost beyond human imagining. If our sun exploded as a supernova, the resulting shock wave probably wouldn’t destroy the whole Earth, but the side of Earth facing the sun would boil away. Clearly, the sun’s distance – 8 light-minutes away – isn’t safe.

Can Betelgeuse destroy Earth?

And within the next million years Betelgeuse is expected to explode. Luckily for us, it is around 600 light years away, far enough that when it explodes Earth is safe. When Betelgeuse explodes it will be so bright that it will outshine the full moon for over a month. But it won’t destroy the Earth.

How close would a supernova have to be to affect Earth?

30 to 1000 light-years

Is Betelgeuse dangerous?

Luckily, Betelgeuse is no threat to Earth. Whenever it does explode, its deadly radiation will spread out equally in all directions, and by the time it reaches us it will be too weak to be of concern. But other supernova candidates, such as Wolf-Rayet stars, are far more dangerous.

How dangerous are supernovas?

Both types are extremely powerful, sending energetic radiation and blast waves of ejected gas far into space. If a supernova explosion were to occur within about 25 light-years of Earth, our planet would probably lose its atmosphere, and all life would perish.

Can our sun go supernova?

A supernova — specifically, a core-collapse supernova — can only occur when a star many times more massive than our Sun runs out of nuclear fuel to burn in its core. When our Sun runs out of hydrogen fuel in the core, it will contract and heat up to a sufficient degree that helium fusion can begin.

What year will the Sun die?

It’s gonna get ugly. Our sun’s death is a long way off — about 4.5 billion years, give or take — but someday it’s going to happen, and what then for our solar system? The trouble begins before the death proper: The first thing we have to contend with is the elderly sun itself.

Could the sun one day end its life as a supernova?

No, it’s too small for that! The Sun would need to be about 20 times more massive to end its life as a black hole. Some smaller stars are big enough to go supernova, but too small to become black holes — they’ll collapse into super-dense structures called neutron stars after exploding as a supernova.

Is the sun black?

As with all matter, the sun emits a “black body spectrum” that is defined by its surface temperature. A black body spectrum is the continuum of radiation at many different wavelengths that is emitted by any body with a temperature above absolute zero. So one might say that the sun is blue-green!

What is the real color of sun?


What color is the hottest star?

Blue stars

Is the sun black from space?

In space or on the Moon there is no atmosphere to scatter light. The light from the sun travels a straight line without scattering and all the colors stay together. Looking toward the sun we thus see a brilliant white light while looking away we would see only the darkness of empty space.

Why do you not see stars in space?

In space, or on the moon, there’s no atmosphere to spread the light around, and the sky will appear black at midday – but that doesn’t mean it’s not just as bright. Even in space, stars are relatively dim, and simply don’t produce enough light to show up in photos set for bright sunlight.

Can you see the sun from space?

How could you determine what color the Sun is as seen from Earth? It is a common misconception that the Sun is yellow, or orange or even red. However, the Sun is essentially all colors mixed together, which appear to our eyes as white. This is easy to see in pictures taken from space.

Is it always dark on the moon?

From the moon, the sky always looks black, even during the lunar day when the sun is shining in the moon’s sky. Here on Earth, our planet’s spin on its axis carries us from daylight to darkness and back again every 24 hours. As seen from any one spot on the moon’s surface, however, the moon doesn’t rise or set.

Why does moon not rotate?

Gravity from Earth pulls on the closest tidal bulge, trying to keep it aligned. This creates tidal friction that slows the moon’s rotation. Over time, the rotation was slowed enough that the moon’s orbit and rotation matched, and the same face became tidally locked, forever pointed toward Earth.

Can you breathe on the moon?

On the moon, there’s no air to breathe, no breezes to make the flags planted there by the Apollo astronauts flutter. However, there is a very, very thin layer of gases on the lunar surface that can almost be called an atmosphere. In the moon’s atmosphere, there are only 100 molecules per cubic centimeter.

Does the sun shine on the moon?

Unlike a lamp or our sun, the moon doesn’t produce its own light. Moonlight is actually sunlight that shines on the moon and bounces off. The light reflects off old volcanoes, craters, and lava flows on the moon’s surface.