Greetings, stargazers. Emission nebulae are the subject of many of the most spectacular astrophotographs published in the last decade. Although there are many subcategories of nebulae, they all ...

This deep view of the Orion Constellation glows in reddish hues thanks to a filtered view of hydrogen alpha emission, a type ...

Ultraviolet light (UV) from newborn stars stimulates the remaining hydrogen in the cloud to emit light at the hydrogen-alpha (Hα) wavelength of 656.28 nanometers, creating a glowing emission nebula.

In this image of the nebula, you can see shades of yellow and gold (ionized oxygen), red (ionized hydrogen) and pink (ionized silicon). Related: 38 jaw-dropping James Webb Space Telescope images ...

Thanks to the James Webb telescope, we can now see the nebula with more clarity. As one expert says, ... the star had been converting hydrogen to helium — but it started to run low on fuel.

This photo shows the Lion Nebula, also known as Sh2-132, located at about 10,000 light-years away in the Cepheus constellation. Formed from expanded shells of gases, the nebula is powered by two ...

The Horsehead Nebula, one of the most famous formations of the cosmos, has just been revealed in a stunning new light.. NASA released photos this week that give the equine-shaped feature a literal ...

Like everything, stars age and evolve. In the distant future the sun's core will heat up, start "burning" helium in addition to hydrogen, and expand into a big balloon of a star called a red giant.

This photo shows the Lion Nebula, also known as Sh2-132, located at about 10,000 light-years away in the Cepheus constellation. Formed from expanded shells of gases, the nebula is powered by two ...

In this image of the nebula, you can see shades of yellow and gold (ionized oxygen), red (ionized hydrogen) and pink (ionized silicon). Related: 38 jaw-dropping James Webb Space Telescope images ...