Related topics: nasa · satellite · earth · solar system · spacecraft

Solar orbiter ready to depart Europe

ESA's Solar Orbiter mission has completed its test campaign in Europe and is now being packed ready for its journey to Cape Canaveral at the end of this month, ahead of launch in February 2020.

The rotation of Venus

Venus is covered in a thick layer of clouds, one reason that it appears so bright in the sky. Ancient astronomers had a good idea of what (since Copernicus) we know as its orbital period; the modern measurement is that Venus ...

ExoMars parachute progress

Positive steps towards solving the problems discovered with the ExoMars mission parachutes have been taken in the last month to keep on track for the July-August 2020 launch window.

Extending the life of geosynchronous satellites

Space Logistics LLC, a subsidiary of Northrop Grumman, has launched a satellite that can extend the life of other satellites. The satellite is called MEV-1, or Mission Extension Vehicle-1. MEV-1 is the first of its kind.

Exoplanet orbits its star every 18 hours

In the past decade, thousands of planets have been discovered beyond our solar system. These planets have provided astronomers with the opportunity to study planetary systems that defy our preconcieved notions. This includes ...

Many gas giant exoplanets waiting to be discovered

There is an as-yet-unseen population of Jupiter-like planets orbiting nearby Sun-like stars, awaiting discovery by future missions like NASA's WFIRST space telescope, according to new models of gas giant planet formation ...

Still no trace of missing Indian moon lander: NASA

A NASA satellite orbiting the Moon passed over the site where the Indian probe Vikram should have made touchdown earlier this month, but didn't see the missing lander, the US space agency said.

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In physics, an orbit is the gravitationally curved path of one object around a point or another body, for example the gravitational orbit of a planet around a star.

Historically, the apparent motion of the planets were first understood in terms of epicycles, which are the sums of numerous circular motions. This predicted the path of the planets quite well, until Johannes Kepler was able to show that the motion of the planets were in fact elliptical motions.[citation needed] Isaac Newton was able to prove that this was equivalent to an inverse square, instantaneously propagating force he called gravitation.[citation needed] Albert Einstein later was able to show that gravity is due to curvature of space-time, and that orbits lie upon geodesics. This is the current understanding.

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