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Carina Nebula

The Carina Nebula, also known as NGC 3372 and the Eta Carinae Nebula, is a large star-forming nebula in the southern constellation Carina.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 27, 2026|2 min read| Fact-checked

The Carina Nebula, also known as NGC 3372 and the Eta Carinae Nebula, is a large star-forming nebula in the southern constellation Carina. It lies in the Milky Way’s Carina–Sagittarius Arm and contains some of the galaxy’s most massive and luminous stars, including Eta Carinae.

Characteristics

The Carina Nebula is an immense cloud of gas and dust with both bright and dark nebulosity. It is a rich emission region dominated by ionized hydrogen and other glowing material.

Location and visibility

The nebula lies in the southern constellation Carina in the Milky Way’s Carina–Sagittarius Arm. It is best seen from southern latitudes and is too far south for clear viewing from most northern locations.

Notable stars and structures

The region includes some of the Milky Way’s most massive stars, especially Eta Carinae, along with clusters and substructures such as the Keyhole Nebula and Homunculus Nebula.

Discovery and study

French astronomer Nicolas-Louis de Lacaille discovered the nebula in 1752 during southern-sky observations. Modern telescopes, including space observatories, have revealed its dense star-forming activity in greater detail.

Key facts

  • It is one of the largest diffuse nebulae known.
  • The nebula is a major region of active star birth and stellar evolution.
  • It contains very massive and luminous stars, including Eta Carinae.
  • The Carina Nebula is visible in the southern sky and is prominent in astrophotography.
  • It was first recorded by Nicolas-Louis de Lacaille in the 18th century.
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Canadian context

Canadian readers may know the Carina Nebula mainly from astronomy education, astrophotography, and images from major space observatories that are widely shared in Canada.

Frequently asked questions

What is the Carina Nebula?
A large diffuse nebula and star-forming region in the southern constellation Carina, also known as NGC 3372.
How far away is the Carina Nebula?
Sources commonly place it at about 7,500 to 8,500 light-years from Earth.
What are its other names?
It is also called the Eta Carinae Nebula, the Great Carina Nebula, and NGC 3372.
Who discovered it?
It was first recorded by French astronomer Nicolas-Louis de Lacaille in 1752.
Why is it important to astronomers?
It is one of the nearest and most active massive star-forming regions, making it valuable for studying stellar birth, feedback, and the evolution of very massive stars.
What notable object is inside it?
Eta Carinae, one of the most massive and luminous stellar systems in the Milky Way, is one of its best-known objects.

References

  1. Wikipedia — https://en.wikipedia.org/wiki/Carina_Nebula
    Supports: General identification, alternate names, constellation, distance, discovery, and broad description.
  2. NASA Science — https://science.nasa.gov/asset/hubble/carina-nebula-2/
    Supports: Nebula as a vast gas and dust cloud and its role in star birth and death; southern constellation location.
  3. NASA — https://www.nasa.gov/image-article/carina-nebula-14000-stars/
    Supports: Star-forming region in the Milky Way and detection of more than 14,000 stars in the region.
  4. NASA APOD — https://apod.nasa.gov/apod/ap190507.html
    Supports: NGC 3372 designation, approximate span, distance, and composition.
  5. Constellation Guide — https://www.constellation-guide.com/carina-nebula/
    Supports: Alternative names, visibility, apparent size, physical extent, and notable substructures and stars.
  6. ESA/Hubble — https://esahubble.org/images/potw1127a/
    Supports: Star-forming region and approximate distance from Earth.