- a law concerning the speed at which planets travel; a line connecting a planet to the sun will sweep out equal areas in equal times; "Kepler's second law means that a planet's orbital speed changes with its distance from the sun" ...
Callisto is the most distant of the Galilean satellites (the others being Io, Europa, Ganymede), and thus is the farthest away from Jupiter. For those counting, it's ~26 Jupiter radii away from its planet, which is notable primarily because it's much farther away than its next closest ne...
There are days which occur in this climate, at almost any season of the year, wherein the world reaches its perfection, when the air, the heavenly bodies, and the earth, make a harmony, as if nature would indulge her offspring; when, in these bleak upper sides of the planet, nothing ...
The planet, GJ 1132 b, is hypothesized to have begun as a gaseous world with a thick hydrogen blanket of atmosphere. Starting out at several times the diameter of Earth, this so-called “sub-Neptune” is believed to have quickly lost its primordial hydrogen and helium atmosphere due to the...
The spacecraft is expected to circle the planet for at least six months, following an elliptical orbit that gets within 365 kilometers (227 miles) of the planet's surface at its closest and 80,000 kilometers (49,700 miles) at its farthest. ...
Again, not talking you about the drive home from the party.Of course the trip was not a perfect circle. As Kepler[开普勒] showed, the Earth’s orbit is an ellipse, with the sun at one of the two focal points. He also figured out the planet goes faster when it’s at ...
The International Space Station orbits the Earth at an average speed of about 7.66 km/s.The Voyager 1 spacecraft, which is the farthest human-made object from Earth, travels at a speed of about 17 km/s.The speed of light in a vacuum is about 300000 km/s....
The Tree as the lungs of the world:In this metaphor, trees are viewed as being connected with the planet. As such, they can serve as barometers for the ecological health of the planet. It was fascinating to read about how different groups had their reasons for seeing the tree as they di...
nottalkingaboutthedrivehomefromtheparty. Ofcourse,thetripwasnotaperfectcircle.AsKeplershowed,theEarth’sorbitisan ellipse,withthesunatoneofthetwofocalpoints.Healsofiguredouttheplanetgoes fasterwhenit’satperihelion,nearerthesun,thanwhenit’sataphelion,itsfarthest ...
He also figured out the planet goes faster when it‟s at perihelion, nearer the sun, than when it‟s at aphelion, its farthest distance. Which would explain why summer seems to zip by, except the seasons are a function of the tilt of the Earth‟s axis, not its different distances...