It turns out that the planets in the TRAPPIST-1 star system have similar density.

Scientists at the College of Washington in the USA made detailed measurements of the plenty and volumes of exoplanets orbiting the purple dwarf star TRAPPIST-1, 40 light-years from Earth.

Scientists have revealed that the common density of the 7 planets in the newly found TRAPPIST-1 star system is similar.

By analyzing “transition time variations” (TTV) in which planets are observable between the orbiting star and Earth, researchers discovered that near-Earth-sized celestial our bodies have remarkably similar imply density.


Scientists beforehand predicted that the Earth-like rocky planets; He concluded that it was composed of oxygen, iron, magnesium and silicon and contained the stated substances in similar proportions.

Whereas the researchers discovered that the density of the planets is 8 p.c lower than that of the Earth, they suppose that this is because of the totally different composition of matter.

In physics, density is outlined as the mass of a unit quantity of a substance, that is, its density.

Three of the planets in the TRAPPIST-1 system, 40 light-years from Earth, have been first found in 2015 by the European Southern Observatory’s Small Telescope for Transitions and Planetary Planets (TRAPPIST).

NASA introduced in 2017 that there are a complete of seven planets in the system, all of that are in the liveable a part of the star, which is appropriate for the emergence of life.

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