expert in or student of astronomy. Scientist studying stars and other bodies in space.

Explanation of something, e.g. a place.

In a way that is obvious/easy to see or understand.

To imagine or picture in your mind.

region surrounding earth or another astronomical body in which its magnetic field is predominant effective magnetic field.

Of a dull greyish-brown colour.. A horse with a sandy or sandy-grey coat, black mane, tail, and lower legs, and a dark dorsal stripe.. make persistent demands on someone.

A thing or issue that people do not agree about. alter coat of arms.

likely or prone to be affected by. conditionally upon. person or thing that is being discussed, described, or dealt with. cause or force person or thing to undergo.

(Of a person) well-known and highly respected. To make something clearly different from others.

flash of lightning with simultaneous crash of thunder. Discharge of lightning accompanied by thunder.

having obligation to do something, or having control over or care for someone, as part.

Concerning the unproved aspects of a subject.

wreathed with laurel as honour. One who has been given great honor in their field.

officially compulsory, or otherwise considered essential. To need something, to make it necessary.

A structure with a roof and walls, e.g. a house. To establish e.g. a reputation, over time.