He began by repeating Jansky's observations, and went on to conduct the first sky survey in the radio frequencies.

Deep sky surveys show that galaxies are often found in relatively close association with other galaxies.

While the repair work went on, naturally we mounted an intensive sky survey.

The team's main recommendation was the founding of an international sky survey to better find and track threatening asteroids.

The discovery was made by searching databases of star images recorded by automated sky surveys.

Several comprehensive sky surveys under way or just beginning are expected to discover many rare or even previously unknown types of astronomical objects and forces.

However, some types of astronomical research are unaffected by these limitations, such as long-term sky surveys and supernova searches.

The data was obtained from scans of 7,435 Schmidt plates taken for the various sky surveys during the last 50 years.

The results of a sky survey have lengthened the odds of such an apocalyptic event occurring to about one in 5,000.

But you are right, it is strange that it has not been picked up in one of the sky surveys.