A close flyby of an asteroid as large as Apophis happens only once every 5,000 to 10,000 years. Scientists plan to learn all they can.

While only a direct hit will be damaging to Earth, just encountering our gravity may trigger on Apophis what would be called ...

NASA alerts the public as asteroid 2024 UT7, a 190-foot-wide space rock, flies dangerously close to Earth today. Travelling at high speed, it's closely monitored for potential impact risks.

Test your news knowledge against the clock. Can you outscore your friends? If you cannot see the quiz, follow this link. Want more of the same? Try last week's teaser, or take Friday's quiz of the ...

58 x 51 cm. (22.8 x 20.1 in.) ...