000 miles). Theplanetorbits the Sun in a path that is presently more nearly a circle (less eccentric) than are the orbits of all but two of the other planets,VenusandNeptune. Earth makes one revolution, or one complete orbit of the Sun, in about 365.25 days. The direction of revolution...
(21 per cent), and some water vapour. The age is estimated at over four thousand million years. Distance from sun: 149.6 million km; equatorial diameter: 12 756 km; mass: 5.976 × 1024kg; sidereal period of axial rotation: 23 hours 56 minutes 4 seconds; sidereal period of revolution ...
The Younger Dryas event (12,900 to 11,600 years ago) is the most intensely studied and best-understood example of abrupt climate change. The event took place during the last deglaciation, a period ofglobal warmingwhen the Earth system was intransitionfrom a glacial mode to an interglacial one...
Since the moon's revolution cycle is the same as its rotation cycle, the same side always faces Earth. The other face, most of which cannot be seen from Earth, is called the far side or "dark side" of the moon. This term doesn't refer to darkness but rather to the mystery shrouding...
This volume is the proceedings of a symposium held at Carleton College to celebrate the 50th anniversary of its Department of Geology and to honor the founder of that department, Larry Gould, later the president of Carleton and long an internationally prominent figure in the area of polar ...
In subject area:Earth and Planetary Sciences 'Earth Movement' refers to the systematic rotations and revolutions of the Earth, including its daily rotation about its axis, annual revolution around the Sun, and the tilt of its axis. It also involves the Earth's varying distance from the Sun du...
In 2015, for our mother Earth, a record of 172 countries across the world stood together to switch their light off for one hour. The tagline was “Change Climate Change”. More than 1200 landmarks were switched off during that period. ...
When a planet gets big enough, when it acquires enough mass, it migrates inwards towards the star. Understanding this phenomenon was a real revolution.当一颗行星变得足够大，当它获得足够的质量时，它会向恒星内部迁移。理解这一现象是一场真正的革命。Planetary migration explains why the majority of ...
Eventually, a space probe sent by these humans uncovered a suitable colony planet, and, over a period of a hundred and thirty years, the vast majority of the human population left Earth behind to start anew on this new planet, in a fleet of great rocket-ships. Two humans named Adam and...
Considering Earth's polar flattening, a better approximation than a sphere of its mostly oceanic surface is an ellipsoid of revolution or spheroid (the term ‘ellipsoid’ is used here as conventionally used in physical geodesy). Such a surface is generated by rotating an ellipse about its minor...