The mercury death notices. Jun 5, 2025 · Mars is the fourth planet from the Sun, and the seventh largest. Jun 5, 2025 · NASA’s real-time science encyclopedia of deep space exploration. . Its gravity holds the solar system together, keeping everything – from the biggest planets to the smallest bits of debris – in its orbit. Jun 5, 2025 · Pluto was once our solar system's ninth planet, but has been reclassified as a dwarf planet. You are using an outdated browser. Our solar system consists of our star, the Sun, and everything bound to it by gravity – the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune; dwarf planets such as Pluto; dozens of moons; and millions of asteroids, comets, and meteoroids. This mammoth moon is the only moon in the solar system with a dense atmosphere, and it’s the only world besides Earth that has standing bodies of liquid, including rivers, lakes and seas, on its surface. Not only is it the largest moon in our solar system, bigger than the planet Mercury and the dwarf planet Pluto, but NASA’s Hubble Space Telescope has found the best evidence yet for an underground saltwater ocean on Ganymede. When it starts to die, the Sun will expand into a red giant star, becoming so large that it will engulf Mercury and Venus, and possibly Earth as well. Please upgrade your browser to improve your experience. Jun 5, 2025 · NASA’s real-time science encyclopedia of deep space exploration. Scientists predict the Sun is a little less than halfway through its lifetime and will last another 5 billion years or so before it becomes a white dwarf. It’s the only planet we know of inhabited entirely by robots. It's located in the Kuiper Belt. Our scientists and far-ranging robots explore the wild frontiers of our solar system. Titan is bigger than Earth's moon, and larger than even the planet Mercury. Jun 5, 2025 · The Sun is the star at the heart of our solar system. xqwnhw hhqnl islpr thbqp qpyttt eyd ivjqs twif zkvq ewq