That sharpens images of both the artificial star and the astronomical target.
The satellite compiled an all-sky survey of 801 astronomical targets before being decommissioned on January 31, 2001.
These allow many astronomical targets to be monitored continuously, and for large areas of sky to be surveyed.
The DRM is made up of astronomical targets, their brightnesses, space density, observing wavelength and resolution.
Scientists can obtain sensitive photometric measurements of astronomical targets.
A scheduled launch date of 30 November was moved several days due to concerns that observations of astronomical targets would be adversely affected.
This is based on the assumption that the axis of alignment of an archaeological site is meaningfully oriented towards an astronomical target.
During the 1990 flight, HUT was used to make 106 observations of 77 astronomical targets.
Europe's Herschel space telescope produces a majestic new version of a classic astronomical target - the Eagle Nebula.
The instrument is designed to be a versatile camera capable of imaging astronomical targets over a very wide wavelength range and with a large field of view.
