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Compared to many extrasolar systems, the Solar System stands out in lacking planets interior to the orbit of Mercury. [ 69 ] [ 70 ] The known Solar System lacks super-Earths , planets between one and ten times as massive as the Earth, [ 69 ] although the hypothetical Planet Nine , if it does exist, could be a super-Earth orbiting in the edge of ...
Relative masses of the Solar planets. Jupiter at 71% of the total and Saturn at 21% dominate the system. Relative masses of the solid bodies of the Solar System. Earth at 48% and Venus at 39% dominate. Bodies less massive than Pluto are not visible at this scale. Relative masses of the rounded moons of the Solar System.
The Milky Way contains between 100 and 400 billion stars [12] [13] and at least that many planets. [143] An exact figure would depend on counting the number of very-low-mass stars, which are difficult to detect, especially at distances of more than 300 ly (90 pc) from the Sun.
Ordinary (baryonic) matter (4.9%) Dark matter (26.8%) Dark energy (68.3%) [6] The observable universe is a ball-shaped region of the universe consisting of all matter that can be observed from Earth or its space-based telescopes and exploratory probes at the present time; the electromagnetic radiation from these objects has had time to reach ...
Likely a faint red star, the object zoomed along at a speed of about 1.3 million miles per hour (600 kilometers per second). In comparison, the sun orbits around the Milky Way at a rate of 450,000 ...
The Local Group is the galaxy group that includes the Milky Way, where Earth is located. It has a total diameter of roughly 3 megaparsecs (10 million light-years; 9 × 10 19 kilometres), [1] and a total mass of the order of 2 × 10 12 solar masses (4 × 10 42 kg). [2] It consists of two collections of galaxies in a "dumbbell" shape; the Milky ...
A galaxy is a system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity. [1][2] The word is derived from the Greek galaxias (γαλαξίας), literally 'milky', a reference to the Milky Way galaxy that contains the Solar System.
Jupiter is the fifth planet from the Sun and the largest in the Solar System. It is a gas giant with a mass more than 2.5 times that of all the other planets in the Solar System combined, and slightly less than one-thousandth the mass of the Sun.