ngc6530

Lagoon Nebula

The Lagoon Nebula, M8, is a star forming region located about 5,000 light years away towards the constellation Sagittarius. Inside the region is NGC 6530, a star cluster that causes the glow of the nebula.

An O type star at the center, Herschel 36, produces radiation that is the primary source for the glow of the Hourglass, the brightest section of the nebula. The difference in temperature between the outer layers of gas and the colder interiors may create a shear that twists the clouds into a tornado- like shape.

Image from HubbleSite, information from HubbleSite and NASA.

The Clouds of Sagitarius by lrargerich on Flickr.

Via Flickr:
This mosaic shows the heart of our own Galaxy: The Milky Way from the Great Sagitarius Star Cloud on the left to the Small Sagitarius Star Cloud (M24) on the right.

The great Sagitarius star cloud on the left is an area free of dust towards the center of our galaxy, what we see is part of the core of the galaxy. This core is depleted of young blue
stars and that’s why it looks so yellow, most of its stars are yellow, orange and red giants.

The small Sagitarius star cloud on the right is also a window but it points to the inner spiral arms of our galaxy and shows how the Milky Way would look if it weren’t obstructed in
so many parts by cosmic dust.

In the middle of the photo we have the famous Lagoon (M8) and Trifid (M20) nebulas, the Lagoon is visible to the naked eye from dark locations. It’s a stellar nursery where new stars
are being born, there’s a very young clutser NGC 6530 at the core of the nebula. The hot young stars ionize the gas in the nebula creating the red glow. It’s then an emission nebula.

The Trifid (M20) is a combination of emission nebula (red), reflection nebula (blue) and dark nebulas (black).