But they could as easily be primordial black holes floating around the galaxy, the astronomers proposed. If that were the case, the putative Planet Nine could well be a black hole, too, in a distant orbit around the sun.
Chandra's scientists have stated that to turn the Earth into a black hole, we would have to contract its entire mass to such an extent that it would become the size of a marble. This contraction will cause the planet to collapse on itself and eventually turn into a black hole.
What might Planet Nine look like? Assuming this planet-like object really does exist out there, Planet Nine's mass would most likely be a magnitude (roughly 10 times) greater than Earth's, with a girth approaching the range of one of our ice giants.
Planet Nine is a hypothetical ninth planet in the outer region of the Solar System. Its gravitational effects could explain the peculiar clustering of orbits for a group of extreme trans-Neptunian objects (ETNOs), bodies beyond Neptune that orbit the Sun at distances averaging more than 250 times that of the Earth.
Planet 9 continues to remain elusive. This potential super-Earth-sized object in the outer Solar System is only hypothetical, as something out there appears to be gravitationally influencing several Kuiper Belt Objects into unusual orbits.
Planet Nine is unnamed, unconfirmed, and unknown. We haven't been able to detect it, and we don't even know for sure that if we did spot it, it would even be a planet. It might be a special kind of black hole, or be made entirely of dark matter.
NASA Discovers 10th PLANET is Larger Than PLUTO | Hidden Planet of The Solar System.
This speculative "Planet 9," according to estimates, would be about 5-10 Earth-masses in size and orbit about 400-800 au from the Sun. A planet at this distance would be extremely difficult to spot in normal optical sky searches because of its faintness, even to telescopes like PanSTARRS and LSST.
According to the paper, Planet Nine might be host to up to 20 moons, each up to 62 miles (100 kilometers) across.
Gas giants are also called failed stars because they contain the same basic elements as a star. Jupiter and Saturn are the gas giants of the Solar System.
The possibility that a black hole could actually impact Earth may seem straight out of science fiction, but the reality is that microscopic primordial black holes could actually hit Earth. If one did, it wouldn't just impact like an asteroid, it'd pass straight through the entire Earth and exit the other side.
A black hole offers plenty of energy sources that might give life a foothold. But a NASA scientist has determined that despite what you saw in the movies, habitable conditions nearby are pretty unlikely.
There is a lot of evidence for the planet – thought to be up to 20 times further out from the Sun than Neptune – but it may be impossible to see with current technology. The giant, hidden planet is thought to be 10 times larger than Earth and on an orbit that takes 10,000 or 20,000 years to go round the sun.
So, what was the IAU's reason for demoting Pluto when it did? Why is Pluto no longer a planet? The main event of the 2006 General Assembly of the IAU, the proposal that would come to demote Pluto, was a defining moment for the rest of the solar system as well.
It may take between 10,000 and 20,000 Earth years to make one full orbit around the Sun. The announcement does not mean there is a new planet in our solar system. The existence of this distant world is only theoretical at this point and no direct observation of the object nicknamed "Planet 9" have been made.
The scientists assume that the planet is a small ice giant with an envelope of hydrogen and helium. With their evolution model they calculated how parameters like the planetary radius or the brightness evolved over time since the Solar System has formed 4.6 billion years ago.
Traveling at the speed of light, it would take approximately 40 years to reach TRAPPIST-1 (not taking relativity into account for simplicity's sake), which, in cosmic terms, is a neighborly jaunt.
Finally, the most probable fate of the planet is absorption by the Sun in about 7.5 billion years, after the star has entered the red giant phase and expanded beyond the planet's current orbit.
Astronomers have announced the discovery of the 100th planet known to inhabit another solar system. The star is 100 light years from Earth in the southern constellation Grus, or The Crane. The planet, one and a half times the mass of Jupiter, has a roughly circular orbit, like those of the sun's family of planets.
Kid-Friendly Neptune
It's the last of the planets in our solar system. It's more than 30 times as far from the Sun as Earth is. Neptune is very similar to Uranus. It's made of a thick soup of water, ammonia, and methane over an Earth-sized solid center.
In 1930, Pluto was discovered and officially named the ninth planet.
In the case of Planet 9, we don't have any gravitational effect on a planet. What we do see is an odd clustering of small icy bodies in the outer solar system known as Kuiper belt objects (KBOs).
And what forces are acting on our planet and our star to make this happen? In short, the sun is getting farther away from Earth over time. On average, Earth is about 93 million miles (150 million kilometers) from the sun, according to NASA.
Named GJ 504b, the planet is made of pink gas. It's similar to Jupiter, a giant gas planet in our own solar system. But GJ 504b is four times more massive. At 460°F, it's the temperature of a hot oven, and it's the planet's intense heat that causes it to glow.