Stars

comparison of the sizes of small stars to the largest planets in our Solar System. EBLM J0555-57Ab, the newly found star, is only slightly larger than Saturn.
Credit: Amanda Smith, University of Cambridge

Smallest known star discovered

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Radio Astronomy Podcast Lunar eclipses, 2019 space missions and green stars

The Orion constellation: differences in colour give a very subtle hint as to how stars can be vastly different. Credit: Zdeněk Bardon/ESO

A guide to stellar spectral classifications

When Neutron stars collide (artist's impression) Image Credit: NASA Goddard Space Flight Center/CI Lab

What are gravitational waves?

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Black hole seen destroying star for the first time

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Stars formed 250 million years after Big Bang

This image composite shows the discovery of the most distant known star using the NASA/ESA Hubble Space Telescope. The image to the left shows a part of the the deep-field observation of the galaxy cluster MACS J1149.5+2223 from the Frontier Fields programme gathered in 2014. The square indicates the position where the star appeared in May 2016 — its image magnified by gravitational microlensing. This part of the image also shows the four images of the Refsdal supernova, arranged in an Einstein cross. The upper right image pinpoints the position of the star, observed in 2011. The lower right image shows where the star was undergoing the microlensing event in late May 2016.

Most distant star ever observed

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New type of exploding star observed

The earliest stars in the Universe have been detected for the first time. A team of astronomers found the imprint of starlight's first glow on the cosmic microwave background radiation.

Earliest stars in the Universe detected

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Black holes devour one star a year

Composite image of CK Vul, the remains of a double-star collision. This impact launched radioactive molecules into space, as seen in the orange double-lobe structure at the center. This is an ALMA image of 27-aluminum monofluoride, but the rare isotopic version of AlF resides in the same region. The red, diffuse image is an ALMA image of the more extended dust in the region. The blue is optical hydrogen emission as seen by the Gemini observatory.

Colliding stars eject radioactive molecules

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Neutron stars’ afterglow brightens

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Special star helps unravel Sun’s variability

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What was the star of Bethlehem?