Saturday , October 1 2022

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


In Beijing on November 28, the alien satellite refers to a satellite that orbits a planet outside the solar system, called the "exoplanet." Since 2009, Kepler and the NASA and TESS (Transit Excavator Satellite) have discovered nearly 4,000 exoplanets, but astronomers have only a satellite outside of the planet. Has been described and still not sure if it is a satellite.

Explosion Kepler-1625b and possible satellites are estimated to be comparable to Neptune. Researchers 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 student, Alex Teachey, first reported this in the journal Science Advances. A possible extraterrestrial satellite.

Using the NASA Hubble Space Telescope, the two researchers analyzed the observations when the ex-plane Kepler-1625b (Kepler-1625b) flew over a star. This is a planet similar to Jupiter, which blocks some of the light as it passes through the star. By analyzing the stellar curve of light, the characteristics of the planet can be determined.

This method of observation is called the transit method (occlusion). Astronomers have used this method to discover thousands of exoplanets. However, the researchers found two surprises while observing the Kepler-1625b process that flies over the star. First, the exoplanet flew over the star 1,25 hours earlier than expected, indicating that something is causing gravity traction. Secondly, after the planet has passed completely star, in the light curve there appears a very small space that can suggest a satellite behind Kepler-1625b.

David Kiping said: "We have removed as much as possible other possibilities, such as detector errors, activities of other planets in the system, or other activities of the stars, but we can not find any other hypothesis explaining our hands.

This potential extraterrestrial satellite is roughly 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 orbits, so this volume is quite amazing. Regarding the current model of planetary satellite system formation, such a satellite should be very rare if it exists.

It is assumed that the quality of Kepler-1625b is about a few times that of Jupiter, and the quality of the satellite potential can be only 1.5% of it. This mass ratio is similar to Earth and Moon. In the Earth and Moon system, it is believed that the moon is made up of the remnants of collisions of the rocky planets. However, astronomers believe that the Kepler 1625b and its possible satellites belong to a gaseous planet and are not composed of rocks, so this extraterrestrial satellite may have been formed through different processes.

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

Looking for life on an off-camera satellite?

Some scientists argue that alien satellites can be a "very viable" world, which means they are good places to live. This is due to the fact that these satellites are not limited to the use of bright energy from the parent stars in the system but can extract energy from other places such as:

Reflected light. Reflected light or thermal radiation from nearby planets can provide long-term stable temperatures and promote the evolution and reproduction of life.

Radioactive elements. Radioactive elements, such as uranium and tori, may exist deep in alien Earth rock formations, and over time these elements slowly cut off and release heat on the surface of the satellite.

Tidal power. The gravitational pull of a large exoplanet, such as the size of Jupiter or Saturn, may involve alien satellites, creating tidal forces similar to the tidal changes produced by the gravitational pull of the moon on Earth. When the surface of the extraterrestrial satellite made up of rocks is pulled by the gravitational traction of the exoplanets, the heat generated can reach the surface of the satellite.

There are about 175 satellites in the solar system in which we are. Many of these satellites have these characteristics, and two are also powerful candidates for alien life: the satellite of Jupiter Europe (Meowe) and Saturn's satellite, Enclades (Luke).

Both satellites have a frozen surface covered with striated stripes created by the gravitational forces of the planet, at temperatures not exceeding 128 degrees Celsius. However, just a few kilometers below their surface, there is a large ocean of liquid that contains liquid water that exceeds the total amount of water in the earth. If liquid water is present, there may be life.

Where are the other satellites outside the band?

Some astronomers estimate there are many frozen satellites with underground oceans in the Milky Way, which may be 100 to 1,000 times larger than terrestrial planets but very hard to find.

Kepler-1625b's basic star 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 weak outlines what passes before her. . For Kepler-1625b, this satellite is relatively easy to detect due to its large size. However, for other out-of-plane satellites that are similar in size to Europe, which is equivalent to a quarter of the Earth's volume, it is not so easy to detect the "naked" signal left by them while passing in front star. Under current technical conditions, these gaps are too small to be clearly identified. So we need a little patience to find more alien satellites.

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