planetary nebula

It is the planetary nebula that was created most recently.

The name planetary nebula has nothing to do with planets.

This is what causes a planetary nebula to look like it does.

This planetary nebula is located at a distance of 4400 light years.

Now they live inside a planetary nebula, with a fluorescent sky around them.

Planetary nebulae are very special objects because they can help make more stars.

It is the brightest of the far southern planetary nebulae.

At the time, it was designated simply as a small faint planetary nebula.

As discussed further below, the central stars of planetary nebulae are very hot.

The gas it pushes away makes a cloud called a planetary nebula.

Planetary nebulae play a very important role in galactic evolution.

One of four globulars known to contain a planetary nebula.

Stars that form planetary nebulae typically live for billions of years.

A big problem in studying planetary nebulae is that astronomers can not always figure out how far away they are.

Planetary nebula may result from the death of intermediate and low mass stars down to 0.8 M.

About 3000 planetary nebulae are now known to exist in our galaxy, out of 200 billion stars.

The Sun is expected to spawn a planetary nebula about 12 billion years after its formation.

It is a small, bright planetary nebula with something to offer in telescopes of most sizes.

Concentrated levels of are found in diffuse and planetary nebulae.

To date, no true association has been established between open clusters and planetary nebulae.

It is the first planetary nebula discovered within a globular cluster.

It forms a giant cloud of gas called a planetary nebulae.

However, when the spectrum was examined again in August 1892, it appeared to be a planetary nebula.

They believe that such interactions dominate the formation process in planetary nebulae.

"All I know is that we're getting signals, and they undoubtedly come from this planetary nebula.