Nemesis (hypothetical star) - Wikipedia
Nemesis is a hypothetical red dwarf [1] or brown dwarf, [2] originally postulated in 1984 [3] to be orbiting the Sun at a distance of about 95,000 AU (1.5 light-years), [2] somewhat beyond the Oort cloud, to explain a perceived cycle of mass extinctions in the geological record, which seem to occur more often at intervals of 26 million years.
Nemesis Theory: Is There a Second Sun in Our Solar System?
Apr 25, 2012 · Nemesis Theory proposes that there is a second sun in our solar system, a death star that will one day cause mass extinction on Earth.
Our Sun May Have Been Born With a Trouble-Making Twin
Dec 9, 2021 · After analysing data from a radio survey conducted on a dust cloud in the Perseus constellation, two researchers from UC Berkeley and the Harvard-Smithsonian Astrophysical Observatory concluded back in 2017 that all Sun-like stars are probably born with a companion.
Nemesis: Is There a Second Star in the Solar System?
Feb 2, 2024 · Some astronomers have hypothesized that our solar system doesn’t just have one star. Instead, they believe the Sun could have a companion dwarf star, which they’ve dubbed Nemesis. Why the ominous name?
What If We Had Two Suns? - HowStuffWorks
Mar 12, 2024 · Two suns might make for a great suntan, but the length of our days and nights would be really wacky. If Earth had two suns, our planet might have extreme cold temperatures, making all water freeze and life as we know it impossible to form.
Red giant - Wikipedia
Fluid dynamics simulations of a red giant, with giant convection cells and puffy surface. A red giant is a luminous giant star of low or intermediate mass (roughly 0.3–8 solar masses (M☉)) in a late phase of stellar evolution.
Second sun: Researchers find new evidence that another star grazed ...
Mar 22, 2018 · Evidence is building that a red dwarf star once grazed the edges of our solar system, and may have been visible in the night sky to humans and some of our now-extinct cousins.
The Second Sun - Full Report (SecondSun.Net)
Jan 15, 2014 · Kepler 16A is an orange dwarf with 69% the mass of the sun, while Kepler 16B is a red dwarf with 20% the mass of the sun. The two stars are separated by a distance of 20.5 million miles (33 million km).
The Second Sun - Overview
Because the second sun was bigger and much hotter than the existing sun, it ran out of fuel much faster. The red surface in the picture above is the surface of Mars; the spherical planet on top of it is Jupiter. Mars is called the red planet because it is covered in rust. https://www.space.com/... https://spaceplace.nasa.gov...
ZetaTalk: Second Sun
Apr 19, 2003 · The appearance has also been described as a second sun, with Egyptian plowmen working their fields under the red cross of Planet X in the daytime sky. In that the placement of Planet X has put it into light pollution at this time, when does this second sun appear, or discernible daylight visibility for that matter?