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 …

Active supermassive black holes may help form...
on August 13, 2026 at 1:11 pm
A popular myth about black holes is that they act like giant cosmic vacuum cleaners, sucking in everything around them. But Wladimir Lyra's research found a new mechanism around supermassive black holes that is more like a cosmic nursery, giving birth to planets more massive than Jupiter.
How the value of star employees changes over a...
on August 13, 2026 at 11:20 am
Overall, star employees tend to create value in different ways as their careers progress. Early on, they create outsized value through their individual performance. Experienced stars, meanwhile, contribute by helping colleagues succeed, sharing expertise and developing future stars.
Space travel doesn't affect the strength of heart...
on August 12, 2026 at 10:20 pm
It's common to see images of astronauts on the International Space Station exercising, running on special treadmills and pedaling cycles designed for tight quarters.
A dying star offers a rare glimpse of how the...
on August 12, 2026 at 10:00 pm
Astronomers have captured an unprecedented image of a cosmic recycling project in progress—fragments of a dying star being busted up, stripped and absorbed into interstellar space.
First supernovae may have seeded rocky planet...
on August 12, 2026 at 9:20 pm
The building blocks of rocky planets may have begun forming just 100 million years after the Big Bang—long before the first galaxies even existed—according to new research from the University of Portsmouth.