Science News Today 14th October 2021: Is it possible for Earth to exist without the Sun? This is a question to which scientists have been searching for the answer for centuries. In another way, this thing can also be asked in such a way that how will the end of our solar system (Sun will become a white dwarf) and in such a situation will our earth survive?
This is such an important question that scientists have tested our knowledge of physics to find the answer. We know that the Sun will one day eventually turn into a ‘white dwarf’, the remnant of a burnt out star. Its dim light will gradually bring darkness to all the planets of our solar system including the earth. By the way, this change will not be so easy, but it will be a fierce process, in which all the planets of the Sun will be destroyed.
Will any planet survive after the death of the Sun?
In such a situation, the question arises whether any planet will survive after the death of the Sun? One way to find the answer is to look at what happened to other similar planets.
University of Warwick researchers Dimitri Veras and Ernest Rutherfort explain that the weak radiation from white dwarfs makes it difficult to find exoplanets (planets around stars other than our Sun) that have survived this stellar transformation. They are really in the dark which are not easy to see.
Information on more than 4,500 exoplanets
In fact, of the more than 4,500 known exoplanets currently known, only a few have been found around stars that have transformed into white dwarfs. The location of these planets shows that they reached there after the death of the star.
This lack of information gives an incomplete picture of the fate of our planet. Luckily, now we are able to fill these gaps.
In our new paper, published in Nature, we report the discovery of the first known exoplanet that survives the death of its star without being altered by other nearby planets in their orbit.
planet like jupiter
This is a new outer planet (exoplanet) that we have discovered with the Keck Observatory in Hawaii. It is similar to Jupiter in mass and orbital separation. It gives important clues about the surviving planets around dying stars.
The transformation of a star into a white dwarf involves a fiery phase, in which it becomes a bloated “red giant”, also known as a “giant branch” star. This star becomes hundreds of times bigger than before.
We believe that only this outer planet has survived. If it was initially close to its parent star, it would have been absorbed into the star’s expansion.
Similarly, when the Sun eventually becomes a ‘red giant’, its radius will actually extend outwards into Earth’s current orbit. This means that the Sun will (probably) contain Mercury and Venus, and possibly the Earth as well.
Survival of Jupiter and its moons expected
Jupiter and its moons are expected to survive, although we don’t know for sure at first. But with the discovery of this new exoplanet, we can now be more certain that Jupiter will indeed pass by. In addition, the margin of error in the position of this exoplanet could mean that it is about half the distance from the White Dwarf as Jupiter is currently closer to the Sun. If so, then there is additional evidence to believe that Jupiter and Mars will be able to survive in the fiery process of change.
Asteroids and White Dwarfs
Planets orbiting White Dwarfs have been difficult to find, but asteroids that break close to its surface have become much easier.
The link between exosteroids and exoplanets also applies to our own solar system. Separate objects in the asteroid main belt and the Kuiper belt (a disk in the outer Solar System) are likely to have survived the Sun’s death, but some will be gravitationally sent by one of the surviving planets toward the surface of the White Dwarf.
The diversity of discovery techniques bodes well for the identification of potential futures, which may provide further insight into the fate of our own planet. For the time being, a recently discovered exoplanet like Jupiter provides the clearest glimpse of our future.
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