room or building housing astronomical telescope. Buildings built for studying and watching the stars.

To think creatively about; form mental picture of.

action of sifting something. To look through and remove less valuable things.

To refer to or talk or write about something.

To create something useful for the first time.

action or process of discovering or being discovered. Learning some things for the first time.

having acquired much knowledge through study. To get knowledge or skills by study or experience.

To lead a TV or radio show as the announcer.

system of millions or billions of stars. A group of stars and planets in space.

having specified appearance. To appear to be when you look at them; seem.

intellectual and practical activity encompassing systematic study of structure and behaviour of physical and natural world.

complete list of items. list items.

Being exactly right; correctness.

way of carrying out particular task. Ways of doing by using special knowledge or skill.

optical instrument designed to make distant objects appear nearer, containing arrangement of lenses, or of curved mirrors and lenses. slide or cause to slide into itself, so that it becomes smaller.