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When large objects impact terrestrial planets such as the Earth, there can be significant physical and biospheric consequences, as the impacting body is usually traveling at several kilometres a second (a minimum of 11.2 km/s (7.0 mi/s) for an Earth impacting body [2]), though atmospheres mitigate many surface impacts through atmospheric entry.
The geologic time scale, proportionally represented as a log-spiral with some major events in Earth's history. A megaannus (Ma) represents one million (10 6) years.. The geologic time scale or geological time scale (GTS) is a representation of time based on the rock record of Earth.
This video shows an artist's impression of the free-floating planet CFBDSIR J214947.2-040308.9. A rogue planet, also termed a free-floating planet (FFP) or an isolated planetary-mass object (iPMO), is an interstellar object of planetary mass which is not gravitationally bound to any star or brown dwarf. [1] [2] [3] [4]
Escape from Planet Earth is a 2013 animated comedy-adventure science fiction film produced by Rainmaker Entertainment and distributed by The Weinstein Company in the United States and Entertainment One in Canada, directed by Cal Brunker (in his feature-length directorial debut), with a screenplay which he co-wrote with Bob Barlen, and features an ensemble voice cast that includes Rob Corddry ...
The Hollow Earth is a concept proposing that the planet Earth is entirely hollow or contains a substantial interior space. Notably suggested by Edmond Halley in the late 17th century, the notion was disproven, first tentatively by Pierre Bouguer in 1740, then definitively by Charles Hutton in his Schiehallion experiment around 1774.
Size comparison of Vega (left) to the Sun (right) The pole of Vega—its axis of rotation—is inclined no more than five degrees from the line-of-sight to the Earth. At the high end of estimates for the rotation velocity for Vega is 236.2 ± 3.7 km/s [ 60 ] along the equator, much higher than the observed (i.e. projected ) rotational velocity ...
Eris was discovered by the team of Mike Brown, Chad Trujillo, and David Rabinowitz [2] on January 5, 2005, from images taken on October 21, 2003. [31] The discovery was announced on July 29, 2005, the same day as Makemake and two days after Haumea, [32] due in part to events that would later lead to controversy about Haumea.
Earth's gravity according to the Preliminary Reference Earth Model (PREM). [13] Two models for a spherically symmetric Earth are included for comparison. The dark green straight line is for a constant density equal to the Earth's average density. The light green curved line is for a density that decreases linearly from center to surface.