Astronz Object of The Week: M8: Lagoon Nebula

The Lagoon Nebula, also known as Messier 8, is one of the brightest and most spectacular star-forming regions in our night sky. Found in the constellation Sagittarius, this vast cloud of gas and dust lies about 4,000–6,000 light years away.

Even from here in New Zealand, it is visible to the naked eye under dark skies as a faint patch of light. Through binoculars, it becomes much clearer, and with a telescope, its structure really comes to life. You’ll see glowing hydrogen gas lit up by the energy of young stars, along with dark lanes of dust that cut across the nebula, giving it its “lagoon” appearance.

The Lagoon Nebula is what astronomers call an emission nebula. Inside, new stars are being born, and their ultraviolet radiation excites the surrounding hydrogen, causing it to glow in pink and red hues when photographed. Some areas within the nebula, such as the Hourglass Nebula region, show especially intense star formation.

For stargazers in Aotearoa, spring is the perfect time to catch the Lagoon Nebula before it dips lower in the evening sky. Aim your telescope towards Sagittarius, just above the teapot’s “spout,” and you’ll be rewarded with one of the southern skies’ most iconic sights.