科学研究   常速英语

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Imagine if our night sky looked like this. Looks cool, doesn't it? Well, what's not cool, is that you'd have to live your life without electricity, cars, rockets, jewelry, or you cell phone. Thi...

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(gentle music) - [Narrator] It's known as Earth's evil twin. - Venus gives us a glimpse into both our past and our future, a past where water formed and perhaps life arose before it d...

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Imagine an entire network of flying cars zooming around at 2,000 meters above our congested city streets. Your morning commute would be a lot different up there: you could travel at higher speeds, ...

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This is the Sun. And this is a neutron star. But don't let its size fool you. Neutron stars are massive gravitational monsters, and orbiting one wouldn't end up well for our planet....

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What if I told you that supernovas aren't the brightest events in the Universe? Gamma-ray bursts are. They shine hundreds of times brighter and only last for several minutes at most. But even...

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Congratulations, you've taken the seven-month-long journey and have finally landed on Mars. And it turns out, you're the first person. Better start cleaning the place up, and getting it...

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See that strip of stars splashed across the night sky? That's our home galaxy, the Milky Way. You can see it from Earth because we live right on the outskirts, far away from all the fun...

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Nothing can travel faster than light. But what if we switched the rules a little? Imagine a world, where the speed of light was slower - about the speed that sound travels at. In turn, th...