Beijing time on November 28, the extraterrestrial satellite refers to a satellite that circles a planet outside the solar system, called the "exoplanet". Since 2009, the National Aeronautics and Space Administration (NASA) Kepler and Transit Excavator Satellite (TESS) have discovered nearly 4,000 exoplanets, but astronomers have only one flat satellite. Described and still not sure of a satellite.
The Kepler-1625b exoplane and its possible satellites can be compared to the size of Neptune. According to researchers, this potential satellite and other similar extraterrestrial satellites may have their own satellites.
In October 2018, David Kipping, Columbia University's astronomer and graduate student Alex Teachey first reported it in the Science Advances journal. A possible alien satellite.
NASA Hubble Space Telescope explored the observations when the exoplane Kepler-1625b (Kepler-1625b) flew to a star. It is a planet of similar magnitude, like Jupiter, which prevents light from passing through the star. By analyzing the starlight curve you can determine the characteristics of the planet.
This mode of observation is called a transit (occlusion) method. Astronomers use this method to discover thousands of exoplanets. At the same time, researchers found two surprises while observing the Kepler-1625b process flying above the star. First, the exoplanet flew above the star for 1.25 hours as expected, resulting in some gravitational drag. Secondly, after the planet has completely passed the star, a very shallow gap appears in the beam, suggesting a satellite behind the Kepler-1625b.
David Kiping said, "We've excluded as many opportunities as detector bugs, other planet's activities in the system or other star operations, but we can not find any hypothesis that can explain our hand.
This potential alien satellite is about the same size as Neptune, about one-third of the Kepler-1625b. Typical satellite size is usually much smaller than around the planet, so this volume is quite amazing. As far as the present planet-satellite system design model is concerned, such a satellite may be very rare if it exists.
It is assumed that the quality of Kepler-1625b is multiple compared to Jupiter and the potential satellite quality is only 1.5%. This weight ratio is similar to Earth and Moon. In the Earth and the Moon system, the moon is thought to emerge from the debris of rocky debris. Astronomers, however, believe that Kepler 1625b and its possible satellites belong to a gaseous planet and are not rocky, so this extraterrestrial satellite can be created with different processes.
"We can not open the champagne celebration now," said Alex Titcher, "but it seems all exciting, attractive, and convincing.
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Some scientists claim that non-Earth-based satellites can be considered a "very viable" world, which means they are in a good location. This is because these satellites are not limited to using light energy from the starbursts in the system, but can gain energy in other places, for example:
Reflective light. Reflective light or heat radiation from near planets provides long-term stable temperatures and can promote the evolution and reproduction of life.
Radioactive element. Radioactive elements, such as uranium and thorium, are deeply in the rock composition of such Earth-sized extraterrestrial satellites, and over time, these elements slowly decompose and release heat to the surface of the satellite.
Price Effect. The gravitational drag of a large exoplanet, such as Jupiter or Saturn, may result in terrestrial satellites, which can create tidal levels similar to those of the moon's gravitational overtones. If the extraneous terrestrial satellite surface is pulled out by the gravity attraction of the beams, the resulting heat can reach the surface of the satellite.
There are about 175 satellites in the solar system. Of these, many of the satellites have this feature, and two are also powerful candidates for finding out-of-earth life: Jupiter Satellite Europa (Meowe) and Saturn's Satellite Enclades (Luke).
Both satellites have a frozen surface covered by a striped strip created by the planet's gravitational force at a temperature of up to 128 degrees Celsius. However, only a few kilometers below their surface there is a huge liquid ocean that contains liquid water that exceeds the total amount of water in the land. The presence of liquid water can be life.
Where are the other out-of-band satellites?
Some astronomers estimate that many of these frozen satellites are found in the Milky Way in the groundwater, which can be 100-1000 times larger than terrestrial planets, but it is very difficult to find.
The Kepler-1625b birthplace is about 8,000 light-years away from Earth, a distance that provides a very small space on Earth, but with advanced detection techniques, scientists can see the planet's weak contingencies as they move ahead. . For Kepler-1625b, this satellite is relatively easy to detect due to its large size. However, in other satellites of a similar size to Europe that are equivalent to one quarter of the Earth's volume, it is not so easy to detect the "gap" they leave as they pass the star. Under the current technical conditions, these shortcomings are too small to be clearly identifiable. So we need a little more patience to find more extraterrestrial satellites.