If we look at the gas giant planets in our solar neighborhood, we see a clear pattern; the more massive the planet, the lower the percentage of "heavier" elements (anything other than hydrogen and helium) in the planet's atmosphere.
But out in the galaxy, the atmospheric compositions of giant planets do not fit the solar system trend, an international team of astronomers has found.
Solar system planets, order and formation: A guide | Space
The order of the planets in the solar system, starting nearest the sun and working outward is the following: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and then the possible Planet Nine.
The solar system extends from the sun, goes past the four inner planets, through the asteroid belt to the four gas giants and on to the disk-shaped Kuiper Belt and far beyond to the teardrop-shaped heliopause.
James Webb telescope detects light from a small, Earth-like planet — and finds it's missing ...
Five years ago, NASA's infrared Spitzer Space Telescope helped discover a family of seven rocky exoplanets orbiting the same star, known as TRAPPIST-1.
Astronomers used JWST's mid-infrared camera, called MIRI, to look for the planet's thermal emission — think heat-sensing "Terminator" vision.
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