Is our sun binary?
A new theory published recently in The Astrophysical Journal Letters by scientists from Harvard University suggests that the Sun may once have had a binary companion of similar mass.
Does our sun have a brown dwarf companion?
UA and European astronomers took this image of a very cool brown dwarf orbiting a star near our sun using the SDI camera on the Very Large Telescope in Chile. The substellar companion appears blue in this image. It is roughly 50 times fainter than its star, and 4.5 times the Earth-Sun distance away from its star.
What was Earth’s twin called?
Venus
Thanks to Venus Express, Taylor now describes Venus as “Earth’s twin, but separated at birth.”
Was Jupiter a failed star?
It may be the biggest planet in our Solar System but it would still need more mass to turn into a second Sun. Jupiter is often called a ‘failed star’ because, although it is mostly hydrogen like most normal stars, it is not massive enough to commence thermonuclear reactions in its core and thus become a ‘real star’.
Is there another Earth in another galaxy?
The Kepler space telescope identified the exoplanet, and its discovery was announced by NASA on 23 July 2015. The planet is about 1,800 light-years (550 pc) away from the Solar System….Kepler-452b.
| Discovery | |
|---|---|
| Star | Kepler-452 |
| Physical characteristics | |
| Mean radius | 1.5 +0.32 −0.22 R Earth |
| Mass | 5 ± 2 M Earth |
How many other suns are there?
Our planetary system is the only one officially called “solar system,” but astronomers have discovered more than 3,200 other stars with planets orbiting them in our galaxy. That’s just how many we’ve found so far. There are likely to be many more planetary systems out there waiting to be discovered!
Is there a Nemesis star?
Nemesis is a theoretical dwarf star thought to be a companion to our sun. The theory was postulated to explain a perceived cycle of mass extinctions in Earth’s history. Scientists speculated that such a star could affect the orbit of objects in the far outer solar system, sending them on a collision course with Earth.
Is Nemesis a black hole?
How do we know Nemesis is not a black hole (or neutron star)? Bookmark this question. Show activity on this post. Nemesis, the hypothetical “death star”, is supposed to be a massive body that orbits the Sun at long distances and periodically sends comets from the Oort Cloud into the inner solar system.