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solar system

Is everything in space spinning in the same direction?

... come to the party to make the star, they add all of their own bit of spin and the average, when you sum it all up, some ... the planets be spinning the same way? And what about our own solar system - is everything spinning the same way in our own solar system? Matt - So many questions. Okay. So, this ...

The first stars in the Universe turn on at about 400 million years after the Big Bang. WMAP data reveals the era.

Was dark matter created with the Big Bang?

... be put together then there can exist things beyond our own universe and dark energy can be some kind of phenomenon that is related to stuff beyond our own universe. And so, once you have that, you could start to ... dark energy, maybe it is something that is outside our own universe that in some sense, you can say, exists ...

Cartoon schematic of an atom

How long do fundamental particles last?

... last for just under 15 minutes if they're on their own. To do an experiment - actually the experiments we do ... a nucleus, then it effectively lasts forever. But, on its own, just under 15 minutes. Dave - So being inside that ...

Sun

How do we know that the sun rotates on its own axis?

... implications. How do we know that the sun rotates on its own axis as it's a ball of fire? It's difficult to look into ... ball of fire, so how do we know that it rotates on its own axis? How do we know that the sun rotates on its own axis? ...

Artist's illustration of an 'isolated neutron star' -- one without associated supernova remnants, binary companions or radio pulsations.

What would happen to a thimble full of a neutron star if you brought it to Earth?

... weirdest things. Something like two times the mass of our own Sun and yet it's concentrated into a tiny, tiny region ... then you have all of these neutrons, and neutrons on their own are not actually stable particles. They're going to try ...

Why does melting ice cause sea level rise?

... year by about 0.5 millimetres. That's Greenland on its own in one year. So if things really do take off with global ... in water, when the ice melts it will only displace its own weight in water. I was curious about the scaremongering ...

Are some galaxies moving so fast as to be invisible?

... fly away from us in the exact opposite direction of our own galaxy. If these galaxies and our own accelerate there should be cases where the speed relative ...

Why did switching on my desk lamp produce interference on my radio?

... again. You will keep getting sparks, each creating it's own surge of current. Your light bulb is flickering because ...

A typical Deutsche Bahn railway station clock

Do photons at light speed stop time?

... a particle, maybe at 99% at the speed of light, in your own frame of reference, time is moving normally. You have a ...

A mirage in the Mojave desert

What causes a mirage in the road?

... refractive index from the air around it. Air also has its own refractive index which depends on the temperature of the ...

The first stars in the Universe turn on at about 400 million years after the Big Bang. WMAP data reveals the era.

What happens when a neutron star collapses?

... and it cools down a bit. It starts to collapse under its own gravity. Stars which are massive enough then start to ...

A circle of arms and legs

Meet the panel

... this pretty spontaneously. If you leave them to do their own thing they’ll make neurons by themselves, but what they ...

Plasma ball

What is plasma?

... with this kind of sea of ions and also electrons on their own, and they’re superconductive. And actually we do ...

Can a moon have a moon?

... be scarily easy - if a star were to pass too close to our own. Stripping the moon off the earth, we think that will ...

sound waves

What is Brown Noise?

... be difficult to prevent the same thing happening to your own soldiers were it to have been efficacious. The other ...

Why are astronomical objects usually spherical?

... The simple answer is it's down to gravity. If we take our own solar system as a really good example, you have the Sun ...

What throws people when hit by lightning?

... thrown around when struck by lightning because of their own muscles, in a process called opisthotonus - sudden ...

Beer bottles

Why does a wet towel cool beer?

... heating it up is causing air currents, it’s making its own winds because it gets hot and air expands so it floats ...

This stellar swarm is M80 (NGC 6093), one of the densest of the 147 known globular star clusters in the Milky Way galaxy. Located about 28,000 light-years from Earth, M80 contains hundreds of thousands of stars, all held together by their mutual...

Why is space cold when it has so many stars?

... these extreme temperatures if they're so far away from our own experience of space? Ryan - So, the temperature of just ...

Are candles bad for the environment?

... animals would've eaten and then incorporated into their own body. So, burning those candles isn't bad for the ...

Is there an antimatter equivalent to light?

... cancel each other out. As far as we know the photon is its own antiparticle. Is there an antimatter equivalent to light? ...

A fire burning

Why do embers glow red?

... region of the spectrum, so we can start to see if with our own eyes. Kat - So if humans were as hot as a fire, we would ...

How strong a cable could be used to stop the moon moving away from Earth?

... that we know of, is not strong enough to support its own weight to travel up to a geosynchronous satellite. To go ...

How does a Yagi aerial work?

... and forwards starts to transmit itself. It makes its own radio waves. You've got a whole series of these all ...

A horseshoe magnet

Why does a broken magnet form two new ones?

... These little magnets are called domains and each has it's own dipole, so a north and south end. Therefore the strength ...