When he shifted between the two images, a moving object, such as a planet, would appear to jump from one position to another, while the more distant objects such as stars would appear stationary.

When the angular velocity of this co-rotating frame is not constant, that is, for non-circular orbits, other fictitious forces — the Coriolis force and the Euler force — will arise, but can be ignored since they will cancel each other, yielding a net zero acceleration transverse to the moving radial vector, as required by the starting assumption that the vector co-rotates with the planet.

When he first encounters the Fourth Doctor in Genesis of the Daleks, Davros is the chief scientist of the Kaleds, one of two native sentient races of the planet Skaro.

When images are first obtained of the surface of a planet or satellite, a theme for naming features is chosen and a few important features are named, usually by members of the appropriate IAU task group ( a commonly accepted planet-naming group ).

When the Romulan / Cardassian fleet arrived at the Founders ' homeworld, they bombarded it, only to realize that the planet was deserted except for a token beacon.

When word of the fleet's defection reached the Dominion command center, the Female Changeling ordered every Cardassian on the planet killed.

:: When Keen's babysitter Molly is abducted by the Bloogs, Keen must come to her rescue by fighting his way through the inhabitants of the planet Fribbulus Xax.

When close to a planet with a strong magnetosphere such as Earth or a gas giant, the magnetic sail could generate more thrust by interacting with the magnetosphere instead of the solar wind, and may therefore be more efficient.

When contamination became too serious to be fixed by memory erasures, Captain Picard decided to make direct contact with a civilization's leaders in " Who Watches the Watchers " and " First Contact ," although the latter episode involved a planet on the verge of achieving warp flight, and therefore eligible for First Contact.

When they had reached Teegeeack, the paralyzed citizens were unloaded around the bases of volcanoes across the planet.

When a planet travels eastward in relation to the stars, it is called prograde.

When the planet travels westward in relation to the stars ( opposite path ) it is called retrograde.

When Kessel is abandoned following Admiral Daala's attack on the planet in Darksaber, Calrissian takes over the planet, converts its prison into a mining complex, and mines spice from the planet for a number of years.

When Hari starts reading the book, he finds it disappointing except for the revealing of what the Mycogenians call their home planet, Aurora.

When he physically visits each location, he discovers an uncharted planet: Aurora, Solaria, and finally Melpomenia.

When R2-D2 leaves the ship to deliver a secret message to Obi-Wan Kenobi, C-3PO follows R2-D2, eventually to the planet Tatooine.

When Jan returns to Earth, approximately 80 years later by Earth time, he finds an unexpectedly altered planet.

When Worlds Collide ( 1951 ) based on a 1933 novel by Philip Wylie, deals with two planets on a collision course with Earth – the smaller planet a " near miss ," causing extensive damage and destruction, followed by a direct hit from the larger planet.

When their spacecraft is destroyed and one group member dies, they commandeer an inferior craft and a base on a distant planet, from which they continue their campaign.

When she names the planet Dantooine as the location of the base, he destroys Alderaan anyway.

The Silver Age Superman was not alone in the survival of Krypton's destruction, being joined by his cousin Supergirl, the Phantom Zone criminals, Beppo the super-monkey, Krypto the Superdog, a juvenile delinquent named Dev-Em, and the entire population of the city of Kandor, Supergirl's real parents and even Superman's real parents ( in hibernation on a space ship-Superboy # 158 July-1969 ), When the planet exploded, one entire city of Krypton, Argo City, survived the cataclysm.

When the bottle city of Kandor was finally enlarged on a new planet, Supergirl's parents joined its inhabitants to live there.

When Earth and Mars became more united, the Third Types were eliminated by a seeming psychotic so as to avoid offending the feminist-leaning Earth.

When Kemp became Dole's running mate in 1996, they appeared on the cover of the August 19, 1996 issue of Time magazine, but the pair barely edged out a story on the reported discovery of extraterrestrial life on Mars, which was so close to being the cover story that Time inset it on the cover and wrote about how difficult the decision was.

When subjected to the same cost-analysis as the 90-day report, Mars Semi-Direct was predicted to cost 55 billion dollars over 10 years, capable of fitting into the existing NASA budget.

When Mariner 9 arrived at Mars on 14 November 1971, planetary scientists were surprised to find the atmosphere was thick with " a planet-wide robe of dust, the largest storm ever observed.

When Jim and Frank sneak into Howe's office and rescue Willis, the bouncer repeats two overheard conversations between Howe and Beecher, the unscrupulous colonial administrator of Mars, detailing Beecher's plans for Willis and the colony.

When he awakens, he is tied up and Mona Mars is there with him.

When the invaders are forced off Mars and land on Earth, they begin to build their tripods.

When Hoffman did win playing Ben Braddock, Brooks called Kenneth Mars in as Liebkind.

When Mariner 9 arrived and successfully orbited Mars on 14 November 1971, just two weeks prior to Mars 2 and Mars 3, planetary scientists were surprised to find the atmosphere was thick with " a planet-wide robe of dust, the largest storm ever observed.

When Mariner 9 arrived and successfully orbited Mars on 14 November 1971, just two weeks prior to Mars 2 and Mars 3, planetary scientists were surprised to find the atmosphere was thick with " a planet-wide robe of dust, the largest storm ever observed.

When he goes to a previous therapist, Dr. Perkins ( who also disliked him ), she realizes his gift: " If Men are from Mars and Women are from Venus, and you can speak Venutian, the world can be yours.

When they arrive on Mars, Santa and the children build a factory to make toys for the children.

When the Venus and Mars recording sessions moved to New Orleans, Britton quit Wings and was replaced by Joe English.

When Sailor Galaxia kills all the Guardian Senshi in Sailor Stars, it is Sailor Mars to whom Sailor Moon immediately rushes to ( although she is devastated over the others being struck down as well ).

When entering into orbit around Mars, the solar array was to be utilized in the aerobraking maneuver, to slow the spacecraft until a circular orbit was achieved.

When that angle is with respect to a reference meridian, it indicates a location along a great circle of a sphere, such as Earth ( see Geographic coordinate system ), Mars, or the celestial sphere.

When 30 Seconds to Mars first started, Jared refused to let his name be used to promote the band.

However, the song further defines this dawning of the age within the first lines: " When the Moon is in the seventh house and Jupiter aligns with Mars then peace will guide the planets and love will steer the stars ".

When Orson Welles ' radio production of The War of the Worlds from The Mercury Theatre on the Air for Halloween in 1938 shocked many Americans and made news, Universal Pictures edited their serial Flash Gordon's Trip to Mars into a short feature called Mars Attacks the World for release in November of that year.