Solar System

hypothetical star orbiting the Sun, responsible of extinction events

In astronomy, the plutinos are a dynamical group of trans-Neptunian objects that orbit in 2:3 mean-motion resonance with Neptune. This means that for every two orbits a plutino makes, Neptune orbits three times. The dwarf planet Pluto is the largest member as well as the namesake of this group. The next largest members are , Achlys, and . Plutinos are named after mythological creatures associated with the underworld.

hypothetical planet between the Sun and Mercury

space travel with humans aboard spacecraft

natural satellite orbiting the dwarf planet Haumea

Solar System object whose orbit brings it into proximity with Earth

astronomical theory that the Solar System formed from nebulous material

material which fills the Solar System

natural satellite of a minor planet

atmosphere of planet Venus

planet much larger than the Earth

right|thumb|270px|The zone, represented by the orange region, in which vulcanoids may exist, compared with the orbits of Mercury (planet)|Mercury, [[Venus and Earth]] The vulcanoids are a hypothetical population of asteroids that orbit the Sun in a dynamically stable zone inside the orbit of the planet Mercury. They are named after the hypothetical planet Vulcan, which was proposed on the basis of irregularities in Mercury's orbit that were later found to be explained by general relativity. So far, no vulcanoids have been discovered, and it is not yet clear whether any exist.

Öpik–Oort Comet Cloud hypothetical planet

Wikimedia list article

Wikimedia portal

Wikimedia list article

branch of space physics concerned with conditions in the Solar System

hypothetical former Solar System planet

power per unit area received from the Sun in the form of electromagnetic radiation

location in the extreme Solar System

Wikimedia list article

bodies orbiting within the main asteroid belt which have shown cometary activity during part of their orbit

persistent hexagonal cloud pattern around the north pole of the planet Saturn

thumb|upright=1.5|The orbits of the four known sednoids (colored pink). Their orbits are so distant that they never cross the Kuiper belt (shown in red). thumb|The apparent magnitudes of three of four known sednoids. thumb|Discovery image of Sedna (dwarf planet)|Sedna, the eponymous and first known sednoid

mining on asteroids

minor planet objects in the outer reaches of the Solar System

asteroid or comet with an orbit such that it has the potential to make close approaches to the Earth

Wikimedia list article

claims that Earth may have other natural satellites

definition of a planet as a body orbiting the Sun, in hydrostatic equilibrium, having cleared the neighborhood around its orbit; ratified by the IAU in August 2006, thereby reclassifying Pluto as a dwarf planet instead

asteroid sharing the orbit of the Earth

proposed system of three narrow dust rings orbiting the moon Rhea

trans-Neptunian object

cosmic dust in the space between the planets of the solar system

A micrometeorite is a micrometeoroid that has survived entry through the Earth's atmosphere. Usually found on Earth's surface, micrometeorites differ from meteorites in that they are smaller in size, more abundant, and different in composition. The IAU officially defines meteoroids as 30 micrometers to 1 meter; micrometeorites are the small end of the range (~submillimeter). They are a subset of cosmic dust, which also includes the smaller interplanetary dust particles (IDPs).

Wikimedia timeline

spacecraft without people on board, used for robotic spaceflight

criterion for a celestial body to be considered a planet

component of the Sun's magnetic field which fills the Solar System

measure in astronomy

Wikimedia list article

Wikimedia list article

Wikimedia list article

in the early days of the Solar System, Jupiter moved inward then reversed course ("tacked") to its current orbit

overview about the discovery and exploration of the Solar System

Wikimedia list article

scientific proposal in 2002 for a destroyed fifth planet

ring system around the minor planet Chariklo

Wikimedia list article

Panguite is a type of titanium oxide mineral first discovered as an inclusion within the Allende meteorite, and first described in 2012.

hypothetical former ring system around Earth first formally proposed in September of 2024

cosmic dust and debris orbiting an astronomical body

aspect of history

branch of astronomy, astronautics and space technology

study of the Sun's behavior

purported first known interstellar object, meteor that hit Earth on January 8, 2014

facula on Ganymede

trans-Neptunian object whose orbit’s semimajor axis is at least 150 AU

Wikimedia list article

numerical model of the early Solar System