The first”extragalactic planet” was discovered, 23 million light-years away from the Milky Way, how was it discovered?
There are eight planets in the solar system. Our earth is orbiting between the orbits of Venus and Mars, with an average distance of about 149 million from the sun Kilometers, the farthest planet from the earth is Neptune, which is about 4.5 billion kilometers away from the sun, and the distance from the earth is between 4.25 and 4.75 billion.
The planet itself does not emit light, so it is far away The planets on Earth are difficult to be discovered by us. Uranus (discovered in 1781) and Neptune were not discovered more than 300 years ago, and Neptune (discovered in 1846) was discovered only 200 years ago. As for non-Solar system planets are even more difficult to find. However, using various advanced telescopes, astronomers have still discovered thousands of exoplanets outside the solar system, some even far away Thousands of light years away.
However, according to”Science and Technology Daily” reports, scientists have discovered A planet that is 23 million light-years away is the most distant planet known to date.
This achievement comes from Harvard-Smithson in the United StatesAstrophysics Research Center, where the astrophysicist Rosanna Di Stefano and others recently published an article saying that this may exist The planet number is M51-ULS-1b, and it is located in the M51 galaxy about 23 million light-years away. This is a spiral galaxy. It is very similar to our Milky Way. At such a long distance, relying on the existing technology of mankind, it is impossible to find the planets located there, but because there is a bright X-ray source there, astronomers were lucky enough to find it. it.
The mass of this planet is similar to that of Saturn in the solar system. Orbiting around a binary star system, one of which is a neutron star (and possibly a black hole), it is devouring the material of the massive companion star at an astonishing speed, and at the same time it releases a lot of energy, emitting a strong light equal to 1 million times the sun. This also makes it one of the brightest X-ray sources in the M51 galaxy, so telescopes on Earth can also see it, and when this planet is in orbit, it just blocks the X-ray source’s light from reaching the earth. At time, it can be observed by us. Astronomers discovered it in this way. This method is also called occultation observation method.
M51-ULS-1b is not only located outside the solar system, It is also outside the Milky Way, so it is not only an exoplanet, but also an exoplanet. It is probably the first exoplanet observed by humans.
September 25th article of”Science and Technology Daily””Humans Discovered Exoplanets in the Galaxy”