In the 1980s an anti-satellite system was developed for the F-15. However, the origin of the air-to-air ASAT system dates ...

The rock tour has officially been canceled. After two months of observations, NASA scientists have officially declared Earth ...

YR4 has a 2.3% chance of hitting Earth in the year 2032. But according to new estimates, it may have an even smaller chance of hitting the moon instead.

After weeks at the top of the Sentry list at the Center for Near-Earth Object Studies, the asteroid 2024 YR4 is no longer considered a threat to Earth.

By contrast, 2024 YR4 falls into the "city killer" category. "If you put it over Paris or London or New York, you basically wipe out the whole city and some of the environs," Bruce Betts ...

Chilling animations depict the apocalyptic impact that “city-killer” asteroid YR4 2024 could have if it did hit Earth — while astronomers warn that the moon could be in the line of fire as well.

Even though the asteroid is relatively small, it could still be what some are calling a "city killer" because if it were to hit Earth, it could cause significant devastation in a populous area.

The July 23 test is being called an anti-missile test, but it's feared the test was actually part of a program an anti-satellite weapon, Defense News reports. Fears are arising among US defense ...

Bruce Betts, chief scientist of The Planetary Society, told AFP that 2024 YR4 could be a "city killer" if it hits Earth: "If you put it over Paris or London or New York, you basically wipe out the ...