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Scientists to find the first extraterrestrial satellite: they can be "very suitable for life" – Science Exploration – cnBeta.COM

Beijing on November 28, the extraterrestrial satellite refers to a satellite that is orbiting a planet outside the solar system, called the "exoplanet". Kepler (NASA) Kepler and Transit Excavator Satellite (TESS) have discovered nearly 4000 exoplanets, but astronomers have only one satellite transmitter. Described and still not sure if it is a satellite.

Exoplan Kepler-1625b and its possible satellites are estimated to be comparable to Neptune. Scientists have said that this potential satellite and other similar alien satellites can even have their own satellites.

In October 2018 David Kipping, Columbia University astronomer, and his graduate Alex Teachey, first reported it in Science Advances. Potential extraterrestrial satellite.

Using Hubble's Hubble Space Telescope, analysts analyzed the observation when the Kepler-1625b (Kepler-1625b) exoplan flew over the star. It is a planet similar to Jupiter that blocks some light when passing through the star. By analyzing the stellar light curve, you can determine the properties of the planet.

This method of observation is called the transit method (occlusion). Astronomers have used this method to uncover thousands of exoplanets. Researchers, however, found two surprises when observing the Kepler-1625b process that was flying over the star. First, the exoplanet was flying over the star for 1.25 hours before it was awaited, suggesting something produces gravity traction. Secondly, after the planet has completely gone through the star, a very shallow gap appears in the light curve, which may mean a satellite behind Kepler-1625b.

David Kiping said, "We have excluded as many other possibilities as detector errors, other planetary activities in the system, or other stellar activities, but we can not find any other hypothesis that would explain our hands.

This potential extraterrestrial satellite is approximately the same size as Neptune, about one-third of the Kepler-1625b. The size of a typical satellite is usually much smaller than the planet it is orbiting, so this volume is quite amazing. As for the current model based on the planetary satellite system, such a satellite should be very rare if it exists.

It is assumed that the quality of the Kepler-1625b is several times greater than that of Jupiter, and the potential of the satellite may be only 1.5%. This weight ratio is similar to Earth and Moon. In the Earth and Moon system, it seems that the moon is the wreckage of the rock collisions of the planets. Astronomers, however, believe that the Kepler 1625b and its possible satellites belong to the gaseous planet and are not composed of rocks, so this extraterrestrial satellite could be made up of different processes.

"We can not hurry to open champagne celebrations now," said Alex Titcher, "but everything looks exciting, attractive and convincing."

Are you looking for life on the satellite outside the camera?

Some scientists say that alien satellites can be a "very lively" world, which means they are a good place to live. The reason is that these satellites are not limited to the use of light energy from the parent stars in the system. They can instead get energy from other places, for example:

Reflected light. Reflected light or heat from nearby planets can provide long-term stable temperatures and can support the development and reproduction of life.

Radioactive element. Radioactive elements such as uranium and thorium can exist deep in rock formations of extraterrestrial satellites of similar magnitude to the Earth, and gradually these elements slowly decay and release heat to the surface of the satellite.

Tidal force. The gravitational pull of a large exoplanet, such as the size of Jupiter or Saturn, may include alien satellites, generating tidal forces similar to the tidal changes caused by the moon's gravitational pull on Earth. When the surface of an extraterrestrial satellite consisting of rocks is gravitationally attracted by exoplanets, the generated heat can reach the surface of the satellite.

In the solar system we have about 175 satellites. Many of these satellites have these characteristics and the two are also powerful candidates for extraterrestrial life: Jupiter Europa (Meowe) and Saturn's Enclades (Luke) satellites.

Both satellites have frozen areas covered by striped strips created by the gravitational forces of the planet, at temperatures not exceeding 128 degrees Celsius. Only a few miles below their surface is a huge, fluid ocean containing liquid water that exceeds the total amount of water in the ground. If liquid water is present, life can occur.

Where are the other satellites out of band?

Some astronomers estimate that there may be many such frozen satellites in the Milky Way with subsurface oceans that may be 100 to 1000 times larger than Earth's planets, but they are very difficult to find.

The parent star Kepler-1625b is about 8,000 light-years from the Earth, a distance that makes it a very small place on Earth, but with advanced detection techniques, scientists can see the planet's faint outlines as it passes before it. . For Kepler-1625b, this satellite is relatively easily recognizable due to its large size. On other non-planar satellites that are similar in size to Europa, equivalent to a quarter of the Earth's volume, it is not so easy to detect the signal "gap" that is left to them as they pass in front of the star. Under current technical conditions, these gaps are too small to be clearly identified. That's why we need a little more patience to find extraterrestrial satellites.

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