The event horizon is a part of a black hole, referring to the region from which even light cannot escape.

He is writing a paper about the event horizon.

I buy daily necessities at the supermarket every week.

Earth science is an important field of study for unraveling the mysteries of nature.

He is respected as a member of the intelligentsia.

This product is made of polyethylene.

My new tablet comes with a stylus.

I decided to take a painkiller because I have a severe headache.

He made travel plans using a globe.

He is using an octant for navigation.