Alan Guth

I'm a cosmologist. All I do is cosmology.

American Physicist

Cosmologist refers to a profession in the scientific study of the universe, a highly specialized academic field.

Academic Field

Some cosmologists focus on theory while others observe space phenomena to gather data.

Specialization

Do not confuse a cosmologist with an astrologer; cosmology is a science, astrology is not.

Not an Astrologer

 leaving remnants like that. On a still bigger scale, we see entire galaxies of stars. We see entire ecosystems where gas is being recycled. And to the cosmologist, these galaxies are just the atoms, as it were, of the large-scale universe.

Sir Martin Rees: Earth...

 Looking up at the night sky, we are amazed by how it seems to go on forever. But what will the sky look like billions of years from now? A particular type of scientist, called a cosmologist,