The solar system consists of the Sun at the center with eight planets, moons, asteroids, and comets orbiting around it. The four inner planets (Mercur
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How do we know about distant planets if we cannot see them easily from Earth?
Telescopes magnify light and reveal distant planets. Spacecraft have been sent to photograph planets up close. Studying light from planets reveals their composition, temperature, and atmospheric properties. Gravity effects from planets on surrounding objects also confirm their existence.
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Could life exist on other planets in the solar system?
Conditions on most planets are too extreme for life as we know it. Mercury is too hot, Venus is a hellish furnace, Mars is too cold and dry, and outer planets are frozen and gaseous. Some moons like Europa (Jupiter) and Enceladus (Saturn) have subsurface oceans where microbial life might exist.
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Why does the Sun not pull all planets into itself?
Planets have orbital motion perpendicular to the Sun's gravity. This moving tangentially while being pulled inward creates a stable orbit. The faster the orbital speed, the farther the planet must be from the Sun to maintain a stable orbit.
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