Wyatt and Whipple, 1950 ), which is a retardation of the orbital motion of particles by the relativistic aberration of the repulsive force of the impinging solar radiation, causes the dust to spiral into the sun in times much shorter than the age of the Earth.

If such is the case, the particles within a distance of about Af of the Earth will have, relative to the Earth, a kinetic energy less than their potential energy and they will be captured into orbits about the Earth.

It is also possible that some of the dust in the vicinity of the Earth originated from meteoritic impacts upon the moon.

Beyond a few million kilometers from the Earth, but still in the region of the Earth's orbit, a prediction of the flux of dust is even more unreliable.

The direct evidence on the micrometeorite environment near the Earth is obtained from piezoelectric sensors ( essentially microphones ) and from wire gages ; ;

if a substantial fraction of the dust is orbiting about the Earth, only about one third the above-mentioned average velocity should be used in deriving the mass.

Of course, if there is a dust blanket around the Earth, the fluxes in interplanetary space should be less than the figures given here.

A measure of the total mass accretion of meteoritic material by the Earth is obtained from analyses of deep-sea sediments and dust collected in remote regions ( Pettersson, 1960 ).

What Gabriel was asking was that mankind forego all its parochial moral judgments, and contract to let the Angels serve on Earth as it is in Heaven regardless of the applicable Earth laws.

The average overall albedo of Earth, its planetary albedo, is 30 to 35 %, because of the covering by clouds, but varies widely locally across the surface, depending on the geological and environmental features.

Human time on Earth is divided up into relevant cultural traditions based on material, such as the Paleolithic and the Neolithic, of particular use in archaeology.

* Earth Architecture-A website whose focus is contemporary issues in earth architecture.

The Arctic Circle is one of the five major circles of latitude that mark maps of the Earth.

A relatively recent role for amateur astronomers is searching for overlooked phenomena ( e. g., Kreutz Sungrazers ) in the vast libraries of digital images and other data captured by Earth and space based observatories, much of which is available over the Internet.

Recently however, funding of projects such as the Lincoln Near-Earth Asteroid Research and Near Earth Asteroid Tracking projects has meant that most comets are now discovered by automated systems, long before it is possible for amateurs to see them.

This unique sound is the backdrop for the band's message of dignity for indigenous people, all of humanity, and Earth.

In Abrahamic religions the view is generally held that one goes to hell or heaven depending on one's deeds and / or faith while on Earth, or predestination and Unconditional election, or to the intermediate state to await the Resurrection of the Dead.

The second resurrection is of the unrighteous, when Jesus brings the New Jerusalem down from heaven to relocate to Earth.

Islam teaches that the life we live on Earth is nothing but a test for us and to determine each individual's ultimate abode be it punishment or Jannat in the afterlife, which is eternal and everlasting.

Iron is usually found as iron ore on Earth, except for one deposit of native iron in Greenland, which was used by the Inuit people.

He published a comprehensive synthesis of his ideas in 1885-1901, entitled Das Antlitz der Erde ( translated as " The Face of the Earth "), which was a popular textbook for many years.

The Ehrlichs did describe these coercive methods in their 1977 textbook, Ecoscience: Population, Resouces, Environment but they did not endorse them, saying, " A far better choice, in our view, is to expand the use of milder methods of influencing family size preferences, while redoubling efforts to ensure that the means of birth control, including abortion and sterilization, are accessible to every human being on Earth within the shortest possible time.

In 1898, Milne ( with W. K. Burton ) published Earthquakes and Other Earth Movements, which came to be regarded as a classic textbook on earthquakes.

For example, the full moon has an angular diameter of approximately 0. 5 °, when viewed from Earth.

Although it has been known for a while that the Black Sea and the Sea of Marmara flow into each other in an example of a density flow, findings of a study by the University of Leeds in August 2010 reveal that there is in fact an underwater channel of high density water flowing across the floor of the Bosphorus ( caused by the difference in density of the two seas ), which would be the sixth largest river on Earth if it were to be on land.

Meteor Crater is perhaps the best-known example of a small impact crater on the Earth.

Many Earth plants and animals undergo major biochemical changes during their life cycles as a response to changing environmental conditions, for example, by having a spore or hibernation state that can be sustained for years or even millennia between more active life stages.

For example, in the 19th century, the Sun appeared to be no more than 20 million years old, but the Earth appeared to be no less than 300 million years ( resolved by the discovery of nuclear fusion and radioactivity, and the theory of quantum mechanics ); or current attempts to resolve theoretical differences between quantum mechanics and general relativity.

For example, a seated passenger in a moving airplane has zero kinetic energy relative to the airplane, but non-zero kinetic energy ( and higher total energy ) relative to the Earth.

This occurs, for example, during an eclipse of the Moon by the Earth — producing a faint, ruddy illumination of the Moon even at totality.

Ephemeris time ( ET ), adopted as standard in 1952, was originally designed as an approach to a uniform time scale, to be freed from the effects of irregularity in the rotation of the earth, " for the convenience of astronomers and other scientists ", for example for use in ephemerides of the Sun ( as observed from the Earth ), the Moon, and the planets.

This research is a notable example of how knowledge encoded by the fossil record continues to contribute otherwise unattainable information on the emergence and development of life on Earth.

For example, in a work of science fiction, some astronaut could use the word, furusato, meaning " my hometown ", when referring to planet Earth.

For example: some early medieval manuscripts of Macrobius include maps of the Earth, including the antipodes, zonal maps showing the Ptolemaic climates derived from the concept of a spherical Earth and a diagram showing the Earth ( labeled as globus terrae, the sphere of the Earth ) at the center of the hierarchically ordered planetary spheres.

For example, an observer will see a ball fall the same way in a rocket ( left ) as it does on Earth ( right ), provided that the acceleration of the rocket provides the same relative force.

Historian Frank Zelko has commented that " unlike Friends of the Earth, for example, which sprung fully formed from the forehead of David Brower, Greenpeace developed in a more evolutionary manner.

For example, Campbell states that, " There have been systems of religion where the mother is the prime parent, the source ... We talk of Mother Earth.

An example of a concave hollow Earth.

For example, a ball dropped towards the ground does not go exactly straight down because the Earth is rotating.

For example, the centrifugal acceleration of the Earth because of its rotation about the Sun is about thirty million times greater than that of the Sun about the galactic center.

For example Venus orbits about 5. 2 km / s faster than Earth and Mars orbits about 5. 7 km / s slower.

It is possible to put stations or spacecraft on orbits that cycle between different planets, for example a Mars cycler would synchronously cycle between Mars and Earth, with very little propellant usage to maintain the trajectory.

For example, a tree could be stationary with respect to an observer on earth, however it will be viewed as moving along with planet Earth for an observer in space.

For example, the " jerk " produced by falling from outer space to the Earth is not particularly useful given the gravitational acceleration changes very slowly.

For example, an object in free-fall near the Moon will experience less gravitational field, and hence accelerate slower than the same object would if it were in free-fall near the Earth.