The cover art uses a picture of the Crab Nebula.

He is best known for discovering the Crab Nebula in 1731.

Not even the distance of their home bases from the Crab Nebula would be told.

Astronomers early this century determined that the descriptions fit the Crab nebula.

The pulsar at the heart of the Crab nebula, for example, rotates 30 times per second.

When you're asked to draw the Crab Nebula on the final exam, what will it look like?

The story ends with the revelation that, 50 years later, another message is received from the Crab Nebula.

We didn't get the chance to study the Crab Nebula in reasonable detail until it was about nine hundred years old.

Another radio source turned out to be the Crab Nebula, the remnants of an exploded star.

The first to be identified with a known visible object was m the Crab Nebula.