One of the largest emission nebulae in the far northern sky can be found in IC 1396, a bright glow in Cepheus that contains several complex objects. Among them are the red supergiant star Mu ...

One of the largest emission nebulae in the far northern sky can be found in IC 1396, a bright glow in Cepheus that contains several complex objects. Among them are the red supergiant star Mu ...

Learn more about how the Vera C. Rubin Observatory will capture more of our stunning universe.

Over time, these stars became known as Wolf-Rayet stars (Charles Wolf was a French astronomer, and helium was first detected by the French scientist Georges Rayet and others), and astronomers came to ...

Letter Published: 15 June 1929 Emission Lines in the Spectrum of the Solar Corona W. ZESSEWITSCH & W. NIKONOW Nature 123, 909–910 (1929) Cite this article ...

Scientists have discovered that something is making cosmic distance markers appear much farther away than they should be.

This region contains 200–300 stars, reflection nebulae such as Cederblad 110 and 111, the Chamaeleon Infrared Nebula, and numerous Herbig-Haro objects, all highlighting ongoing low-mass star ...

Planetary nebulae have long served as objects with known brightness that help measure distances to far-off galaxies. The technique, called the Planetary Nebula Luminosity Function (PNLF), relies on ...

Astronomers have created a galactic masterpiece: an ultra-detailed image that reveals previously unseen features in the ...

Named for the nearby star Rho Ophiuchi, this region in the constellations Ophiuchus and Scorpius boasts emission, reflection, and dark nebulae, star clusters, and a red 1st-magnitude star, Antares.