Converse of subject

• discover: Juno was the third asteroid to be discovered by astronomers early in the 19th century.

• observe: The crab nebula is the remnant of a supernova that was observed by Chinese astronomers in 1054.

Converse of object

• bud: Here you will find plenty of information for budding astronomers: A guide to the current month's.. .

• allow: Where these images fall in the cluster allows astronomers to calculate the mass of the cluster in a different way.

• enable: These unusual emissions enabled astronomers to pinpoint these two faint stars among the myriad of other faint stars in the cluster.

• lead: A free public lecture by one of the worlds leading astronomers proved to be a huge success last night.

• help: To help astronomers locate the stars, the sky is divided up into 88 areas.

Adjective modifier

• amateur: Few UK amateur astronomers are aware how easily the LPS light can be filtered.

• Danish: Dee noticed it, as did the Danish astronomer Tycho Brahe, an admirer of Dee's.

• eminent: Winning cat chosen by eminent astronomer, Sir Patrick Moore CBE FRS.

• observational: We are interested in the views of all UK observational astronomers, whether they have used Gemini or not.

• Polish: Myths: Leo was introduced by Polish astronomer Johann Hevelius in the 17th century.

Modifies a noun

• Ptolemy: It is claimed that the great astronomer Ptolemy was the one burdened with the responsibility of taking a philosophical stance and offering a resolution.

• royal: Nevil Maskelyne, afterward astronomer royal, became curate of Barnet in 1755.

Noun used with modifier

• radio: For historical reasons, radio astronomers call the point spread function the beam.

• X-ray: For this reason they are a technology of great interest to X-ray astronomers.

• guest: People booked for a flight are given a pre-flight lecture by the two guest astronomers with Nigel being the regular contributor.

• century: By the 19th century astronomers had developed the technology to objectively measure a star's brightness.

• expert: They use interactivity to enable the participation of novices in the scientific process just as expert astronomers do on a daily basis.