Nov 14, 2025 · Cosmology, the field of study that brings together the natural sciences, particularly astronomy and physics, in a joint effort to understand the physical universe as a unified whole.

Washington, D.C. is a territory and not a state, nor is it part of any U.S. state. It is surrounded by the state of Maryland on the northwest, northeast, and southeast and bordered by the state of Virginia, …

1 day ago · Washington, D.C., capital of the United States, coextensive with the District of Columbia, located on the northern shore of the Potomac River. Often referred to simply as D.C., the city is an …

cosmology, Field of study that brings together the natural sciences, especially astronomy and physics, in an effort to understand the physical universe as a unified whole.

Nov 28, 2025 · Washington, D.C. - Capital, Founding, Monumental: Washington was established as the capital of the United States as the result of a compromise following seven years of negotiation by …

1 day ago · The White House is the office and residence of the president of the United States at 1600 Pennsylvania Avenue N.W. in Washington, D.C. Since the administration of George Washington …

Sep 23, 2025 · Cosmology is the scientific study of the universe as a unified whole, from its earliest moments through its evolution to its ultimate fate. The currently accepted cosmological model is the …

Nov 6, 2025 · Like most of his predecessors— Aristarchus of Samos was an exception—Hipparchus assumed a spherical, stationary Earth at the centre of the universe (the geocentric cosmology).

Should the U.S. offer a path to citizenship for undocumented immigrants? Learn the pros and cons of the debate.

Georgetown, section of the city of Washington, D.C., U.S., at the confluence of the Potomac River and Rock Creek, about 2.5 miles (4 km) northwest of the national Capitol. Georgetown was settled late in …