A proposed mission seeks to retrieve Vanguard-1 and display it as an ancient relic of the space age.

Launched in 1958 and silent since the Johnson era, Vanguard 1 is the oldest human-made satellite still orbiting Earth — and a ...

An awkward-looking, spherical satellite the size of a grapefruit launched in March 1958, and was boosted into a high elliptical orbit. The satellite, named Vanguard-1, was a test of launch ...

Launched on March 17, 1958, this grapefruit-sized shiny metal sphere is now the oldest human-made object still in orbit. Placed in a high elliptical orbit, it is still there, hovering between 650 ...

The new footage features a close-up of the moon’s far side, an area that is not visible from Earth, taken after the lander transitioned from a high elliptical orbit to a lower elliptical orbit ...

These forces can become very large when the objects have a high mass, like stars, planets or moons. As well as holding planets and asteroids in orbit around the Sun, these gravitational forces ...