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- In roughly 5 billion years, the Sun will cool and expand outward to many times its current diameter (becoming a red giant), before casting off its outer layers as a planetary nebula and leaving behind a stellar remnant known as a white dwarf. In the distant future, the gravity of passing stars will gradually reduce the Sun's retinue of planets.
en.wikipedia.org/wiki/Formation_and_evolution_of_the_Solar_System
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Jun 25, 2021 · Nights would be unbelievably darker, as the moon provides light to the Earth during the night hours by reflecting light from the sun. Scientists suggest that without human-made lighting, we would not be able to see the hands in front of our face without the moon during the nighttime.
About 4.6 billion years ago, this gigantic cloud was transformed into our Sun. The processes that followed gave rise to the solar system, complete with eight planets, 181 moons, and countless asteroids. Researcher Tim Gregory explains how it burst into being.
Eventually, the Sun will likely expand sufficiently to overwhelm the inner planets (Mercury, Venus, and possibly Earth) but not the outer planets, including Jupiter and Saturn. Afterward, the Sun would be reduced to the size of a white dwarf , and the outer planets and their moons would continue orbiting this diminutive solar remnant.
In the Copernican system, the Moon was considered to be no longer a planet but a natural satellite of the Earth, and was originally thought to be the only body in that system whose revolution was not centered on the Sun.
Without the moon, we might be careening from upright to sideways. With a near-zero degree tilt we'd barely see a few minutes of sun or — like Uranus, with its 97-degree tilt — we might find ourselves in 42 continuous years of sunlight, followed by 42 years darkness.
- Kate Kershner
Dec 7, 2021 · Here we are, 4.5 billion years into the lifetime of our sun, with an array of planets and smaller objects orbiting around it. How did all the planets form, and why did they end up in the orbits...
6 days ago · The solar system consists of Earth and seven other planets all orbiting around the Sun. The Sun, moon, and planets all move in predictable patterns called orbits. Many of these orbits are observable from Earth. The entire solar system orbits around the Milky Way galaxy.
