A similar scenario unfolded in 2004 with Apophis, an asteroid initially projected to ... For 2024 YR4, the explosion from an airburst would equal around eight megatons of TNT — more than 500 ...

The head of planetary defense at the European Space Agency discusses 2024 YR4, an asteroid with a small chance of striking Earth eight years from now.

After astronomers discovered the asteroid Apophis in 2004 ... at a speed of around 38,000 miles per hour and generate an explosion equal to nearly 8 million tons of TNT. That's 500 times the ...

Article continues below The last time an asteroid came close enough to Earth with more than a 1% chance of impact was in 2004, when the Apophis asteroid ... out in a big explosion consistent ...

It also has a 0.3 percent chance of hitting the moon and not the Earth, resulting in an explosion ... This asteroid has surpassed the chance of impact briefly held by Apophis in 2004.

Damage could be done, experts said, as the space rock’s threat has surpassed that of Apophis ... “The asteroid would create an enormous explosion,” Boslough said. Multistory buildings ...

The explosion of an asteroid of size 25m could ... who tracked the most hazardous asteroid Apophis said, "We didn't know what to do. We discovered something, we determined an impact probability ...

The last time was about 20 years ago, with the asteroid Apophis in 2004 ... square kilometers of forest had been flattened by a big explosion, high up in the atmosphere. And this is very ...

A similar scenario unfolded in 2004 with Apophis, an asteroid initially projected to ... For 2024 YR4, the explosion from an airburst would equal around eight megatons of TNT — more than 500 ...

It also has a 0.3 percent chance of hitting the moon and not the Earth, resulting in an explosion ... one the size of Apophis, at about 1,100 feet across and once posed a risk to Earth, could cause ...