Before communications satellites, such signals had to be relayed via earth-based relay towers which had to be placed in sight of one another. The original idea of geosynchronous communications ...

Space agencies have systems in place to spot, track, and forecast the future orbits of potentially hazardous asteroids.

Here is the gravitational constastant, and is the mass of the earth. For a stable circular orbit, the centrifugal force, which is directed outward radially must balance the gravitational force, which ...

But our worldly perceptions deceive us. The airless chasm between Earth and the moon is so vast, stretching an average of 239,200 miles wide, that it'd take a 747 jet airplane flying at top speed ...

A near-Earth object was likely ejected into space after an impact thousands of years ago. Now it could contribute new ...

HD 20794d orbits its star with two other super-Earth planets, designated b and c, which orbit their star every 18.3 and 89.6 days, respectively. These were discovered in 2011 by a team of Geneva ...

But to travel from low-Earth orbit (LEO) to farther orbits—or even the Moon—requires ... to the Moon or even from a geosynchronous transfer orbit (GTO) to Mars,” NASA wrote on its website ...

ISRO achieved a historic milestone with its 100th mission, highlighting the reliability of the PSLV with 62 missions. The ...

The upcoming launch of the Geosynchronous Satellite Launch Vehicle (GSLV-F15) will be ISRO's 100th rocket launch from the ...