Monday's approach won't be the closest in recent history. In 2003, Mars was closer to the Earth than it had been in nearly 60,000 years. It’s not expected to be that close again until August 2287.

NASA's Parker Solar Probe made history with the closest-ever approach to the sun last December, and we're finally getting a ...

The Near Approach of Eros.—Prof. H. N. Russell gives, in the Scientific American for January, a clear account of the methods being employed for using the present approach of Eros for obtaining ...

THE APPROACH OF COMET PONS-WINNECKE TO THE EARTH IN JUNE 1927.—This approach was the closest cometary approach to the earth since that of Lexell's Comet in 1770. That comet had been discovered ...

That's among the 10 closest comet approaches that have occurred since 1950 and the 20th closest approach of a comet dating as far back as the ninth century A.D. Get the Space.com Newsletter.

Australian scientists first discovered Florence in 1981. This encounter is the closest since 1890, and it won’t come closer until 2500. Maybe Apophis will have destroyed us by then. Fingers crossed!

The closest planet outside our solar system orbits a young Sun-like star only 10.5 light years away—so close that telescopes might soon be able to snap pictures of it, new observations confirm.