Scientists have determined that the average masses of 7 planets in the newly discovered TRAPPIST-1 star system are similar.
Scientists at Washington University in the USA made detailed measurements of the mass and volume of the exoplanets in orbit of the red dwarf TRAPPIST-1, which is 40 light years from Earth, in the study they published in the “Planetary Science Journal”.
Examining the “transit time variations” (TTV) in which the planets orbit the star and Earth are observable, scientists have found that celestial bodies of similar size to Earth have a remarkably similar average eigen-mass.
Scientists concluded that the planets, which were previously thought to have rocky structures similar to Earth, consist of a combination of oxygen, iron, magnesium and silicon and contain these substances in similar proportions.
While the researchers found that the densities of the planets were 8 percent lower than that of Earth, they think this is due to the different composition of matter.
In physics, self mass is defined as the mass of a unit volume of a substance, that is, its density.
Three of the planets in the TRAPPIST-1 system, 40 light years from Earth, were first discovered by the Transitional Planetary and Planets Small Telescope (TRAPPIST) of the European Southern Observatory in 2015.
The American Aviation and Space Agency (NASA) announced in 2017 that there were a total of 7 planets in the system, all of them in the habitable part of the star, which is suitable for the emergence of living life.
Source: Cumhuriyet Gazetesi – Güncel by www.cumhuriyet.com.tr.
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