Star

Cosma / Communication / Knowledge / Realm / Physical / Universe / Planetary System / Star
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star : a self-luminous gaseous spheroidal celestial body of great mass which produces energy by means of nuclear fusion reactions — Merriam-Webster See also OneLook

Thesaurus

Roget’s II (Thesaurus.com), Merriam-Webster Thesaurus, Visuwords

Encyclopedia

Star is a luminous sphere of plasma held together by its own gravity. The nearest star to Earth is the Sun. Many other stars are visible to the naked eye from Earth during the night, appearing as a multitude of fixed luminous points in the sky due to their immense distance from Earth. Historically, the most prominent stars were grouped into constellations and asterisms, the brightest of which gained proper names. Astronomers have assembled star catalogues that identify the known stars and provide standardized stellar designations. However, most of the stars in the Universe, including all stars outside our galaxy, the Milky Way, are invisible to the naked eye from Earth. Indeed, most are invisible from Earth even through the most powerful telescopes. — Wikipedia

Star (Encyclopædia Britannica)

Star (COSMOS: The SAO Encyclopedia of Astronomy)

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Adventures

Explore related posts on Cosma …

Touch the Sun - Remember how Icarus wanted to touch the Sun, but met his demise instead? Well, scientists at NASA wanted to touch the Sun too, but unlike Icarus, they succeeded! Better yet, they are beginning to share what they learned by doing it! Before we get into all of that, let’s go back and start at the … Continue reading Touch the Sun

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Inspiration

Hubble Skymap puts the night sky at your fingertips any time of day. Roam the Milky Way to find a selection of stars and nebulae as seen by Hubble. To explore the skymap, scroll, double click, or pinch/swipe to zoom in and out. Roll over an icon to see the object, click to zero in, and click again for a detailed view and a description. Drag the map to navigate. — Hubble Skymap (NASA Science)

Hubble Skymap (NASA Science)

Big Idea 8: We Are All Made of Stardust (Big Ideas in Astronomy, International Astronomical Union)

Talks about Stars (TED: Ideas Worth Spreading)
Articles about Stars (Big Think)

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Innovation

Science

Space, But Messier (YouTube Channel)

Stars (NASA Science)
Life and Death of Stars Interactive (NASA’s Universe of Learning)

Stars Videos (ViewSpace, Space Telescope Science Institute)
Stars Theme Videos (ViewSpace, Space Telescope Science Institute)
Star Formation Videos (ViewSpace, Space Telescope Science Institute)
Life and Death of Star Videos (ViewSpace, Space Telescope Science Institute)

Life Cycle of Stars (Astrum, YouTube Playlist)

Stars (SciShow Space, YouTube Playlist)

Star Formation (Max Planck Institute for Astronomy)

Stars (Lunar & Planetary Institute)

Stars (Eric Weisstein’s World of Astronomy, Wolfram Research)

Stars (Wolfram Alpha)
Star Clusters (Wolfram Alpha)
Star Charts (Wolfram Alpha)

Commerce

Buying Stars and Star Names (International Astonomical Union)
Naming of Astronomical Objects (International Astonomical Union)
Naming Stars (International Astronomical Union)

GSC-II (Association of Universities for Research in Astronomy)
Guide Star Catalog (Wikipedia)

CNS3 – Gliese Catalog of Nearby Stars, 3rd Edition
Gliese Catalogue of Nearby Stars (Wikipedia)

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Preservation

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Participation

Education

NASA Goddard (YouTube Channel)
NASA Goddard Space Flight Center (Official Website)

Stars (Imagine the Universe, NASA Goddard Space Flight Center)
Stars (Cosmos4Kids)
Stars (Space Scoop)

Star Learning Resources (National Air and Space Museum)

Stars (Astronomy Center, ComPADRE)

MERLOT: Multimedia Educational Resource for Learning and Online Teaching
OER Commons: Open Educational Resources

Course

Stars (Crash Course Astronomy, YouTube Video)
Low Mass Stars (Crash Course Astronomy, YouTube Video)
White Dwarfs & Planetary Nebulae (Crash Course Astronomy, YouTube Video)
High Mass Stars (Crash Course Astronomy, YouTube Video)
Neutron Stars (Crash Course Astronomy, YouTube Video)
Black Holes (Crash Course Astronomy, YouTube Video)
Binary and Multiple Stars (Crash Course Astronomy, YouTube Video)
Star Clusters (Crash Course Astronomy, YouTube Video)

Community

Organization

International Astronomical Union Division G – Stars and Stellar Physics
American Association of Variable Star Observers

News

Stars (Nova Research Highlights, American Astronomical Society)
Star Formation (Nova Research Highlights, American Astronomical Society)
Stellar Evolution (Nova Research Highlights, American Astronomical Society)

Journal of the American Association of Variable Star Observers

Stellar Astronomy (EurekaAlert, AAAS)
Stellar Astronomy (JSTOR)
Stellar Astronomy (NPR Archives)

Stars (Sky & Telescope)
Stars (Astronomy Magazine)

Stars (Science Daily)
Stars (Phys.org)

Recent News from Phys.org …

Planned 1.7 million satellites 'devastating' for...
on July 4, 2026 at 10:20 pm
The 1.7 million satellites that companies are aiming to launch into Earth's orbit in the coming years will have "devastating consequences for astronomy," new research warned Wednesday.
Astronomers may have caught an early galaxy in...
on July 4, 2026 at 1:40 pm
Astronomers have spotted many "red and dead" galaxies in the early universe. These are massive systems that stopped forming stars surprisingly early in cosmic history. Now, they may have found evidence of one in the act of becoming dead: a massive galaxy being stripped of its star-forming gas just 1.4 billion years after the Big Bang. The clues behind why it lost its star-forming material are detailed in a paper posted to the arXiv preprint server on June 16.
Hot Jupiter winds reveal exoplanet magnetic...
on July 3, 2026 at 3:10 pm
Planets beyond our solar system can have magnetic fields similar to those closer to home, astronomers said Tuesday after observing extreme winds on scorching worlds known as "hot Jupiters."
JWST discovers a new barred spiral galaxy
on July 3, 2026 at 2:40 pm
An international team of astronomers reports the discovery of a new massive barred spiral galaxy. The newfound galaxy, designated M1149-BSG-z5, was identified using the James Webb Space Telescope (JWST). The finding was detailed in a paper published June 23 on the preprint server arXiv.
NASA's Hubble spots star-spangled cosmic scene
on July 3, 2026 at 1:36 pm
More than 500,000 stars blaze red, white, and blue in this image from NASA's Hubble Space Telescope, released in celebration of the United States' 250th anniversary. The image showcases Messier 3 (M3), one of the Milky Way galaxy's most massive globular clusters, or spherical collections of gravitationally bound stars. Globular clusters are made up of ancient stars that formed at roughly the same time from the same cloud of gas, giving those stars similar ages. Around 150 known globular […]