If planet X were indeed a black hole, how would we know? The researchers argue that dark-matter annihilation is the thing to search for. No one knows if primordial black holes exist.

Visit the movie page for 'Planet X Dark Red Star on a Collision Course With Earth' on Moviefone. Discover the movie's synopsis, cast details and release date. Watch trailers, exclusive interviews ...

Scientists hunting for Planet Nine, an elusive planetary body that could change our understanding of the solar system, have found something. Planet X is a hypothetical planet seven times the mass ...

For decades astronomers have searched for a possible “Planet X” in the far outer reaches of our solar system, speculating that something big and dark may be lurking out there, its ...

The paper reported discovery of what appears to be a dwarf planet, dubbed 2012 VP113 (nicknamed “Biden”), that's currently about three times farther from the sun than is Pluto -- out beyond ...

As a climate journalist, I’ve spent almost my entire life thinking and writing about climate change. As I reckon with the sometimes subtle shifts that a changing climate is bringing to my own ...

Journalist and author Elizabeth Kolbert on "The Takeout" — 4/16/2021 45:58. ... the planet could face an event comparable to the extinction of the dinosaurs in the near future. ...

Dark energy isn't good for life in the universe. Thismysterious substance, which cosmologists believe makes up around 70 percent ofthe universe, may eventually pull apart galaxies, then stars and ...

The elusive Planet Nine, which is theorized to be lurking somewhere in the outer reaches of the solar system, may not be a planet after all, a new study suggests.

Among the possibilities cited in the paper are a dark, icy world that’s more than 100 AU away, or a super-Earth that’s about 300 AU away, or a super-cool brown dwarf that’s out in the Oort ...