Arriving just in time to stop men from turning their planet into a radioactive wasteland, the Overlords unite earth into one world in which justice, order, and benevolence prevail and ignorance, poverty, and fear have ceased to exist.

Observations of the radio emission of a planet which has an extensive atmosphere will probe the atmosphere to a greater extent than those using shorter wave lengths and should in some cases give otherwise unobtainable information about the characteristics of the solid surface.

The received radiation is compared with the radiation from a hypothetical black body which subtends the same solid angle as the visible disk of the planet.

`` That it had found a planet on which human beings could live and which was already inhabited by sentient beings ''!!

There is a relatively small addition of flow in the Indian Ocean, with the transport south of Tasmania reaching around 147 Sv, at which point the current is probably the largest on the planet.

* In John Christopher's 1967-68 trilogy of novels The Tripods, an alien race known as " the Masters " live in three huge, domed arcologies built on Earth to use as a base from which to colonise the planet.

Aberration should also be distinguished from light-time correction, which is due to the motion of the observed object, like a planet, through space during the time taken by its light to reach an observer on Earth.

One example which could have been overlooked without historical records is the Mayan interest in the planet Venus.

What makes an individual substance – a man, a tree, a planet – real is a distinct act, a " to be ", which actuates its unity.

The planet Neptune was discovered in Capricornus by German astronomer Johann Galle, near Deneb Algedi ( δ Capricorni ) on September 23, 1846, which is appropriate as Capricornus can be seen best from Europe at 4: 00am in September.

Gauss's method involved determining a conic section in space, given one focus ( the Sun ) and the conic's intersection with three given lines ( lines of sight from the Earth, which is itself moving on an ellipse, to the planet ) and given the time it takes the planet to traverse the arcs determined by these lines ( from which the lengths of the arcs can be calculated by Kepler's Second Law ).

Stanisław Lem has also studied the same idea in his novel The Invincible ( 1964 ), in which the crew of a spacecraft landing on a distant planet finds non-biological life-form, which is the product of long, possibly of millions of years of mechanical evolution.

While a young researcher working for the Lowell Observatory in Flagstaff, Arizona, Tombaugh was given the job to perform a systematic search for a trans-Neptunian planet ( also called Planet X ), which had been predicted by Percival Lowell and William Pickering.

As predicted beforehand, the collisions generated enormous seismic waves which swept across the planet at speeds of and were observed for over two hours after the largest impacts.

Radio observations revealed a sharp increase in continuum emission at a wavelength of 21 cm after the largest impacts, which peaked at 120 % of the normal emission from the planet.

An example of silicon based life forms takes place in the Alan Dean Foster novel Sentenced to Prism in which the protagonist Evan Orgell is trapped on a planet whose entire ecosystem is mostly silicon-based.

Their only specialty organ is their eyes, which they harvest as fruit from the Ghanj-Rho eye-tree on their home planet.

The entire species dies out every 50, 000 years except for one who tends for all the eggs, which take the form of silicon nodules scattered throughout the caverns and tunnels of its home planet, Janus VI.

* in Doctor Who's first series after its revival, episodes 4-5 and 11 featured the alien Slitheen family of the planet Raxicoricofallapatorius, which were said to be Calcium-based life forms, causing them to be blown up in contact with vinegar.

Also, the Grox can only exist on barren planets which cannot support other life, and when a planet is terraformed the Grox inhabiting it die immediately.

But it is more than irony: one of the main reasons why nationalism is no longer a tenable concept is because it has spread throughout the planet.

This result suggests a very high temperature at the solid surface of the planet, although there is the possibility that the observed radiation may be a combination of both thermal and non-thermal components and that the observed spectrum is that of a black body merely by coincidence.

`` The planet is very low in radiation from mineral deposits, and the atmosphere seems to shield out most of the solar output.

Suppose it is something right on the planet, native to it.

An aircraft is a vehicle that is able to fly by gaining support from the air, or, in general, the atmosphere of a planet.

In Robert L. Forward's novel Timemaster, the wormhole is a living organism resembling a fourth-dimensional sea anemone, " stretched " to cover the distance between a spaceship and a satellite on the home planet.

The principle it works on, the constant of simultaneity, is analogous in some ways to gravity ... One point has to be fixed, on a planet of certain mass, but the other end is portable.

Scientists dismiss these mechanisms as implausible since, for example, the magnetic field, when measured from earth, of a large but distant planet such as Jupiter is far smaller than that produced by ordinary household appliances.

In Asimov's Empire and Foundation series, the capital planet Trantor of the galactic empire is a completely built-up planet, covered in its entirety with tall buildings and subterranean structures.

* In Lois McMaster Bujold's Vorkosigan Saga novels, the inhabitants of the planet Komarr live in arcologies, because the surface of the planet is inhospitable.

Aberration is usually larger than a planet's light-time correction except when the planet is near quadrature ( 90 ° from the Sun ), where aberration drops to zero because then the Earth is directly approaching or receding from the planet.

The 1997 Rolf de Heer film, Epsilon, also known as Alien Visitor, an alien in female form descends to Earth from Epsilon in the Southern Cross, and inspires an Outback traveler to better his planet.

Although he is best known for discovering the dwarf planet Pluto in 1930, the first object to be discovered in what would later be identified as the Kuiper belt, Tombaugh also discovered many asteroids ; he also called for serious scientific research of unidentified flying objects.

* In the Stargate SG-1 fourth season episode " Scorched Earth ", a Human society known as the Enkarans are threatened on their new homeworld by an alien ship that is terraforming the planet to be suitable for the sulfur-based Gadmeer species.

* Makemake, the largest known cubewano and a dwarf planet

It is the brightest extrasolar event known to have been witnessed on the planet.

W. Lyra of the Max Planck Institute for Astronomy has suggested names mostly drawn from Roman-Greek mythology for the 403 extrasolar planet candidates known as of October 2009.

Most known exoplanets orbit stars roughly similar to the Sun, that is, main-sequence stars of spectral categories F, G, or K. One reason is that planet search programs have tended to concentrate on such stars.

Internet-based fictional languages are hosted along with their " conworlds " on the Internet, and based at these sites, becoming known to the world through the visitors to these sites ; Verdurian, the language of Mark Rosenfelder's Verduria on the planet of Almea, is a flagship Internet-based fictional language.

A gas giant ( sometimes also known as a jovian planet after the planet Jupiter, or giant planet ) is a large planet that is not primarily composed of rock or other solid matter.

Hot Jupiters are currently the most common form of extrasolar planet known, perhaps due to the relative ease of detecting them.

This theme is also explored in the Doctor Who story The Dæmons in 1971, where the local superstitions around a landmark known as The Devil's Hump prove to be based on reality, as aliens from the planet Dæmos have been affecting man's progress over the millennia and the Hump actually contains a spacecraft.

He is best known for proposing the Gaia hypothesis, which postulates that the biosphere is a self-regulating entity with the capacity to keep our planet healthy by controlling the chemical and physical environment.

The scattered objects between Jupiter's orbit and the Kuiper belt are known as Centaur ( minor planet ) | centaurs.

At one time found on every Thrint estate throughout the Thrintun empire, the only known survivors in Known Space are on the planet Jinx, though they are later found on the Ringworld and on a forested planet called Beanstalk ( in the Man-Kzin Wars story " Hey Diddle Diddle ").

Mariner 4 ( together with Mariner 3 known as Mariner-Mars 1964 ) was the fourth in a series of spacecraft, launched on November 28, 1964, intended for planetary exploration in a flyby mode and performed the first successful flyby of the planet Mars, returning the first pictures of the Martian surface.

The Skrulls have also been known to be in a long and consistent war against the Majesdanians, who live in a milky planet named Majesdane.

Each planet is a kind of petri dish in which a particular human culture — derived to some extent from a culture known historically on Earth — thrives and changes.

Earth ( or, " the earth ") is the only planet presently known to support life, and its natural features are the subject of many fields of scientific research.

Life is only known to exist on the planet Earth.

Although the planet Earth is currently the only known body within the solar system to support life, current evidence suggests that in the distant past the planet Mars possessed bodies of liquid water on the surface.