Asteroid

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Introduction1

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Dictionary

asteroid : any of the small rocky celestial bodies found especially between the orbits of Mars and Jupiter — Webster

OneLook, Free Dictionary, Wiktionary

Encyclopedia

Asteroids are a class of Small Solar System Bodies in orbit around the Sun. They have also been called planetoids, especially the larger ones. These terms have historically been applied to any astronomical object orbiting the Sun that did not show the disk of a planet and was not observed to have the characteristics of an active comet, but as small objects in the outer Solar System were discovered, their volatile-based surfaces were found to more closely resemble comets, and so were often distinguished from traditional asteroids. Thus the term asteroid has come increasingly to refer specifically to the small rocky–icy and metallic bodies of the inner Solar System out to the orbit of Jupiter. They are grouped with the outer bodies—centaurs, Neptune trojans, and trans-Neptunian objects—as minor planets, which is the term preferred in astronomical circles.

There are millions of asteroids, many thought to be the often shattered remnants of planetesimals, bodies within the young Sun’s solar nebula that never grew large enough to become planets. A large majority of known asteroids orbit in the asteroid belt between the orbits of Mars and Jupiter or co-orbital with Jupiter (the Jupiter Trojans). However, other orbital families exist with significant populations, including the near-Earth asteroids. Individual asteroids are classified by their characteristic spectra, with the majority falling into three main groups: C-type, S-type, and M-type. These were named after and are generally identified with carbon-rich, stony, and metallic compositions, respectively. — Wikipedia

Asteroids (Eric Weisstein’s World of Astronomy, Wolfram Research)
Encyclopædia Britannica

Portal

Solar System Exploration: Asteroids (NASA)
Asteroid Things (Wikipedia)

Search

WolframAlpha

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Innovation

Science

Planetary Defense Office (NASA)
NASA Office to Coordinate Asteroid Detection, Hazard Mitigation (NASA)
Planetary Defense Coordination Office, Press Release (PDCO, NASA)

Twenty Years of Tracking Near-Earth Objects (NASA/JPL)
Near-Earth Objects Internet Resources (Library of Congress)

Near-Earth Objects (Minor Planet Center, International Astronomical Union)
Near Earth Asteroids (Minor Planet Center, International Astronomical Union)
Potentially Hazardous Asteroids (Minor Planet Center, International Astronomical Union)
1+ KM Near-Earth Objects (Minor Planet Center, International Astronomical Union)

OSIRIS-REx Mission (NASA)
OSIRIS Rex (Wikipedia)
101955 Bennu (NASA)
101955 Bennu (Wikipedia)

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Preservation

History

The Discovery of Asteroids (ESA)

Library

WorldCat, Library of Congress, UPenn Online Books, Open Library

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Participation

Education

What is an Asteroid? (Space Place, NASA)
More to Explore: Asteroids, Comets and Meteorites (NASA)
Comets, Meteors & Asteroids (Ask an Astronomer, Cornell University)
Asteroids (Cosmos4Kids)

Course

Crash Course Astronomy (YouTube)

OER Commons: Open Educational Resources

Community

Organization

International Astronomical Union (IAU)

News

Science Daily, Phys.org, NPR Archives

Book

ISBNdb

Government

Document

USA.gov

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Expression

Fun

The Great Asteroid of 1998 (FailBook)

Poem

OEDILF: The Omnificent English Dictionary In Limerick Form


More News …

Phys.org - latest science and technology news stories Phys.org internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine.

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    on May 19, 2022 at 2:55 pm

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  • Wealthy nations are carving up space and its...
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  • China announces its new flagship space telescope...
    on May 10, 2022 at 4:14 pm

    Distant galaxies, dark matter, dark energy and the origin and evolution of the universe itself are some of the many scientific goals of China's newly announced space telescope. If all goes according to plan, the China Space Station Telescope (CSST) will blast off atop a Long March 5B rocket sometime in late 2023. Once in a safe orbit, CSST should begin observations in 2024. Judging by these research topics, it looks like the Chinese Academy of Sciences is throwing down an impressive scientific […]

returntotop

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Adventures

Explore related posts on Cosma

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Related

Here are links to pages about closely related subjects.

Knowledge Realm

Physical

“Fundamentals”
Law (Constant) Relativity
Force Gravity, Electromagnetism (Light, Color)
Matter (Microscope) Molecule, Atom (Periodic Table), Particle

“Space”
Universe (Astronomical Instrument)
Galaxy Milky Way, Andromeda
Planetary System Star, Brown Dwarf, Planet, Moon

Our Neighborhood
Solar System Sun
Terrestrial Planet Mercury, Venus, Earth (Moon), Mars
Asteroid Belt Ceres, Vesta
Jovian Planet Jupiter, Saturn, Uranus, Neptune
Trans-Neptunian Object
Kuiper Belt Pluto, Haumea, Makemake
Scattered Disc Eris, Sedna, Planet X
Oort Cloud Etc. Scholz’s Star
Small Body Comet, Centaur, Asteroid

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Notes

1.   The resources on this page are are organized by a classification scheme developed exclusively for Cosma.