universe galaxy solar system planet star order

Eris has been given an estimate based on its size and composition. Several large objects (such as (136472) 2005 FY 8 Ixion) are not listed because their masses are not yet given on their main articles. The mass of 20000 Varuna was estimated based on values given at for its diameter and density. Some were taken from the Planetary Fact Sheets. The eight planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Many of these values were taken directly from the appropriate Wikipedia article. Our solar system is made up of a starthe Suneight planets, 146 moons, a bunch of comets, asteroids and space rocks, ice, and several dwarf planets, such as Pluto. Objects of mass between 10 6 kg to 10 9 kg (less than 1000 Gigagrams (Gg) ).Ĭurrently all the objects listed here are Near-Earth asteroids (See also: list of NEAs by distance from Sun.) Note that 1994 WR 12 possesses less mass than the Great Pyramid of Giza, (5.9 × 10 9 kg).Objects of mass between 10 9 kg to 10 12 kg (less than 1000 Teragrams (Tg) ).Ĭurrently all the bodies listed here are Near-Earth asteroids (See also: list of NEAs by distance from Sun.) NEA, Venus-crosser, Mars-crosser, Mercury-crosser inner-solar-system comets) are almost always less massive than 1 Pg. (See also: list of NEAs by distance from Sun.) Other NEOs that are not asteroids (e. Now: The solar system is a much calmer place now, though occasional asteroid impacts still threaten Earth.Objects of mass between 10 12 kg to 10 15 kg (less than 1000 Petagrams (Pg) ).Ī few of the smallest of the irregular satellites of the gas planets are listed here, as well as the largest near-Earth asteroids due to unusual interest for their nearness. Three quarters of life, including the dinosaurs, go extinct. Saturn gets its rings.Ħ6 million years ago:Ě giant asteroid impacts Earth, triggering global climate change. Someīombard the inner planets and likely deliver water and organics toĤ to 3 billion years ago: Small world bombardment causes widespread volcanism on the inner planets.ģ.8 to 3.5 billion years ago: Life begins on Earth.ģ billion years ago: Mars loses most of its atmosphere and water.Ģ.5 billion years ago: Photosynthetic organismsĮvolve on Earth and pump oxygen into our atmosphere, helping create theġ billion years ago: Volcanism on the Moon stops.ġ00 million years ago:Ěn impact on the Moon forms Tycho crater. Orbits shift, scattering small worlds throughout the solar system. A), galaxy, solar system, universe, planet. D) The statement is not meant to be literal rather, it means that our knowledge of the universe is growing. Where are the oldest stars in the Milky Way galaxy located A), black holes. C) Average distances are increasing between galaxies. The further away a star is, the fainter it looks. All the stars in the night sky, including our Sun, are just some of the residents of this galaxy, along with millions of other stars too faint to be seen. B) Everything in the universe is gradually growing in size. The Milky Way is a huge city of stars, so big that even at the speed of light, it would take 100,000 years to travel across it. A Mars-sized planet collides with Earth, and the debris forms the Moon.Ĥ.5 to 4.1 billion years ago: The Sun gravitationally separates from its protostar siblings.Ĥ.1 to 3.8 billion years ago: The giant planets' A) Average distances are increasing between star systems within galaxies.

Rank the following objects from largest to smallest: filament, galaxy, planet, star. One or more ice giants may have also formed that were later ejected from the solar system.Ĥ.55 billion years ago: Let there be light: The Sun begins fusing hydrogen into helium.Ĥ.5 billion years ago: Mercury, Venus, Earth, and Mars form. Use what you learned in Chapter 1 to rank the following objects from smallest to largest: Earth, Milky Way Galaxy, solar system, sun. At least UranusĪnd Neptune form closer to the Sun than where they are today. Saturn, Uranus, and Neptune form around the protosun. To learn more, read our Solar System History 101 article.ġ3.8 billion years ago: The Big Bang forms the universe.Ĥ.6 billion years ago: A group of protostars, one of which will become the Sun, form from a cloud of debris left by prior star explosions in the Milky Way.Ĥ.59 billion years ago: The giant planets Jupiter, According to this theory, space and time emerged together 13.787 ± 0. The below timeline shows some key events that led to our existence on Earth, from the creation of the universe to present day. The universe is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy.The Big Bang theory is the prevailing cosmological description of the development of the universe. Where did we come from? How did the planets, asteroids, comets, and small worlds in our solar system come to be? When did it all happen? These are some of the core questions that drive us to explore other worlds.

Universe galaxy solar system planet star order