Time lapse video taken from the corona of the Parker Probe Sun.

The center of our galaxy is about 26,000 light-years from Earth. Now if you look at the constellation Sagittarius you are looking at the center of our galaxy. If you look at the picture of our galaxy with tens of...

Gravity map is a map of the intensity of the Earth's gravitational field. How to do it. Simply put.The two satellites orbit the Earth at a distance of over 200 km. It is also linked to other GPS satellites, which...

The first use of aircraft was during World War I. In the early years of the war, planes were increasingly used for espionage and surveillance, but as the war progressed, air strikes became more deadly by the end of the...