There is a theory that says that the Sun has a sister star called Nemesis, which from time to time, gets closer, destabilizes the orbits of comets and asteroids, and causes them to impact the planets. This star would be to blame for the mass extinctions that have occurred throughout the history of life on Earth.
How possible is it for a star to cause this? And most importantly, is there a twin star of the Sun called Nemesis?
Let's find out!
First of all, we must know how stars are formed. The origin of the stars is in the nebulae, immense concentrations of dust and gas. This matter gradually concentrates in different nebula areas until gravity causes them to collapse, forming stars.
Is there evidence of the existence of the star Nemesis?
Many may wonder, if the Sun had a twin sister orbiting around it, how come we have never seen her?
A dark star
An explication is that we have not found the Nemesis star because it could be a dark star, that is, a brown dwarf. Brown dwarfs are in a "gray area" in classifying celestial objects. They are bigger than a planet, but not as big as a star, and generally do not have enough mass to initiate nuclear hydrogen fusion reactions at their core.
The search for a ghost
Because it is almost impossible for a star or a brown dwarf to exist, much less a black hole. A few years ago, a new theory emerged, which is taken more seriously in the scientific community.
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Credits: Ron Miller, Mark A. Garlick / MarkGarlick.com ,Elon Musk/SpaceX/ Flickr
Video Chapters:
00:00 Introduction
02:20 Alpha centauri and proxima centauri
03:40 Is there evidence of
07:36 Could the nemesis star exist?
09:07 The search for a ghost
11:40 Is Jupiter a failed star?
15:28 Why Jupiter has remained a planet?
17:05: Is there any chance that this could happen?
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