PULSARS

A pulsar's spin and magnetic axes
Picture taken from http://imagine.gsfc.nasa.gov/docs/science/know_l1/pulsars.html

 

RADIOACTIVE ISOTOPES

 

GAMMA-RAY BURSTS

Gamma ray bursts graph, measured in counts per second.
Picture taken from http://imagine.gsfc.nasa.gov/docs/science/know_11/bursts.html

 

OTHER SOURCES

A spinning black hole binary.
The above picture is taken from http://imagine.gsfc.nasa.gov/docs/features/news/30apr01.html is of a spinning black hole binary.  As you can see, the black hole is pulling in gas from its companion and emitting jets of x-rays/gamma rays..

 

THE CRAB NEBULA

The Crab Nebula

 

DOWN TO EARTH

Earth as seen from space.
Picture taken from ftp://ftp.hq.nasa.gov/pub/pao/images/index/photoindex/ES.htm