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Asteroid Defense
65 million years ago, a massive asteroid struck Earth. Not only did Jupiter not stop it, but it most likely caused the impact itself.
Fears of celestial collisions — and calculations of their likelihood — go back to the very origins of modern science itself.
Asteroid 2024 YR4, which could devastate a city's worth of humans, has gone from 1.2% to 2.3% to 2.6% to 3.1% chances of impact. Here's why.
Peaking on the night of August 11/12, up to 100 bright meteors per hour will be visible. Here's how to make the most of it.
11mins
Humanity has two giant collisions to thank for its existence, explains biologist Sean B. Carroll.
Meanwhile meteorite hunters rushed to Berlin to find this most rare space rock.
The asteroid is expected to come within 140,000 miles of Earth — well inside the moon’s orbit.
Does humanity have a moral imperative to seed life on lifeless worlds? And should we avoid colonizing a planet if life already exists there?
Many impact craters on Earth have been erased thanks to wind, water, and plate tectonics. But scientists have clever ways to find them.
The nature of civilizational threats has changed in a mere decade.
Some of them have survived the wilds of space for billions of years.
You can't throw a DART at everything in space.
In 2020, scientists took more than a kilo of moon rock and soil back to Earth for testing.
The largest hazardous asteroid found in the last 8 years showcases a little-known class of planet-killers. And we're woefully unprepared.
The DART mission tested whether it's possible to deflect an asteroid by crashing something into it.
This technological feat changes our cosmic history.
Sooner or later, Earth is going to be hit by a large enough space object to cause significant damage to humanity. Stopping them isn't easy.
On the morning of June 30, 1908, an explosion of more than 10 megatons occurred above the sparsely populated Siberian Taiga. What caused the so-called Tunguska event?
Spaceguard shows that we can manage risks to the extinction of humanity — if only we put our mind to it.
The surface of asteroid Bennu is more like a plastic ball pit than the Moon.
6mins
Humans won’t survive if we stay on Earth. Michio Kaku explains.
Most potentially hazardous asteroids remain unidentified. NEO surveyor could change that, but only if it's funded, and soon.
60% of all potentially dangerous asteroids remain undetected.
The odds are slim, but the consequences would be devastating. Here's what would happen, plus how to avoid it.
65 million years ago, an asteroid strike caused the 5th great mass extinction. Could we save Earth, today, from a similar event?
Space missions in 2022 will include massive rockets and asteroid collisions. This is also the year space tourism starts to hit its stride.
“Should they strike, each of them has an energy at impact equal to all of the nuclear weapons on Earth combined."
And the one step we can take to show extraterrestrials we’re figuring it out. Every year, Earth’s meteor showers accomplish two important tasks. This composite photograph shows a large number of […]