The industry has also been pursuing X-ray light sources as a path to the future.

But new X-ray sources known as synchrotrons have reduced data collection time to a few days or even less than a day.

The system is an X-ray source and the primary star appears to be suffering from substantial mass loss.

Very few X-ray sources ever exceed one crab in brightness.

But there are certain X-ray sources consisting of binary stars.

The mean density of X-ray sources is about one source per square degree.

These two ideas account for several types of known X-ray sources.

Far behind, hard X-ray sources were faded to pale red stars.

Finally, some of these galactic X-ray sources were found to be highly variable.

These early X-ray sources still are studied and often produce significant results.