For astrodynamics reasons, cheap spacecraft travel to other planets is only practical within certain time windows.

For instance, the motion of a spacecraft, regarding its orbit and attitude ( rotation ), is described by the relativistic theory of classical mechanics, while the analogous movements of an atomic nucleus are described by quantum mechanics.

For instance, if limited onboard power fed to its engine was the dominant limitation on how much payload a hypothetical spacecraft could shuttle ( such as if intrinsic propellant economic cost was minor from usage of extraterrestrial soil or ice ), ideal exhaust velocity would rather be around 62. 75 % of total mission delta v if operating at constant specific impulse, except greater optimization could come from varying exhaust velocity during the mission profile ( as possible with some thruster types, including mass drivers and variable specific impulse magnetoplasma rockets ).

For example, a ramjet might collect 1 gram of incoming ions per second from interstellar space beyond the heliopause, at a velocity of 50 km / s relative to the ramjet driven spacecraft.

For orbital spaceflights, spacecraft enter closed orbits around the Earth or around other celestial bodies.

For spacecraft near the Sun, solar panels are frequently used to generate electrical power.

For missions beyond low Earth orbit NASA is building the Space Launch System and the Orion spacecraft.

For the Mercury, Gemini, and Apollo spacecraft, such communications blackouts lasted for several minutes.

For the Apollo 13 mission, the blackout was much longer than normal because the flight path of the spacecraft was unexpectedly at a much shallower angle than normal.

For a rocket the payload can be a spacecraft launched with the rocket, or in the case of a ballistic missile, the warheads.

For spacecraft carrying instruments for which an altitude of 36000 km is suitable the Geostationary orbit is sometimes the preferred choice.

For example, nuclear pulse propulsion is a form of spacecraft propulsion that would use nuclear explosives to provide impulse to a spacecraft.

* For communications between spacecraft, including elements of a satellite constellation

For Salyut, small modifications had to be made to the docking port of the OPS to accommodate Soyuz spacecraft in addition to TKS spacecraft.

For this reason, reaction wheels are often used to aim spacecraft with cameras or telescopes.

For launches above low Earth orbit ( LEO ), the actual launch time can be somewhat flexible if a parking orbit is used, because the inclination and time the spacecraft initially spends in the parking orbit can be varied.

For example, consider a spacecraft travelling from the Earth to Mars.

For example, the capacity ( separated spacecraft mass ) of the Delta IV Heavy:

For example, if two spacecraft are in the same circular orbit and wish to dock, unless they are very close, the trailing craft cannot simply fire its engines to go faster.

For example, a dish antenna on a spacecraft is a high-gain device that must be pointed at the planet to be effective, whereas a typical Wi-Fi antenna in a laptop computer is low-gain, and as long as the base station is within range, the antenna can be in any orientation in space.

For communicating with the Deep Space Network, the spacecraft transmitted data across the x-band using a 0. 6-meter parabolic high-gain antenna, medium-gain antenna ( MGA ) and low-gain antennas ( LGA ) depending on mission phase, and a 15-watt transponder design originally intended for the Cassini spacecraft.

For storing data when the spacecraft was unable to communicate with Earth, the processor card was able to store 128-megabytes, 20 % of which was occupied by the flight system software.

For the sad truth is that while one might write well without having read Bartleby The Scrivener, one is more likely, to write well if one has `` read it, and much else.

For many nights afterward, the idea of her having been so close to me in that imagined bed would return and fill me with obscure and painful desires, would cause me to lie awake in shame, tossing with irresolution, longing to fall into a deep sleep.

For all her domineering ways, I can't conceive of her having had a deadly enemy ''.

For he had just remembered: tonight they were having their first guests.

For example, after having established that the set X contains only non-empty sets, a mathematician might have said " let F ( s ) be one of the members of s for all s in X.

For example, amateur athletes in sports such as basketball, baseball or football are regarded as having a lower level of ability than professional athletes.

For example, antibacterial selection within whole bacterial populations for strains having previously acquired antibacterial-resistance genes was demonstrated in 1943 by the Luria – Delbrück experiment.

For example, the Hindu deity of Ganesh is represented as having the head of the elephant, thereby symbolizing that the fruit of righteous worships is abundance

For example, George Livingstone Robinson's dissertation on chapters 9-14 concluded that those chapters had their origin in the period between 518 and 516 BCE and stand in close relation to chapters 1-8, having most probably been composed by Zechariah himself.

For contingent reasons having to do with the Inquisition, Descartes spoke of motion as both absolute and relative.

For example, the flugelhorn differs from the cornet by having a higher percentage of its tubing length conical than does the cornet, in addition to possessing a wider bore than the cornet.

For example, an 8-bit CPU deals with a range of numbers that can be represented by eight binary digits ( each digit having two possible values ), that is, 2 < sup > 8 </ sup > or 256 discrete numbers.

For Gilbert Ryle ( 1949 ), a category ( in particular a " category mistake ") is an important semantic concept, but one having only loose affinities to an ontological category.

For Mexicans, " Chicano " meant having Mexican parents, but being born into U. S. soil.

The reverse reads " EX SC PP OB CIVES SERVATOS ", meaning " Senatus Consulto " ( approved by the Senate ), " Pater Patriae " ( to the father of his country ), " Ob Cives Servatos " ( For having saved the citizens ).

For instance, David is portrayed as having been dishonored when his concubines had a sexual relationship with his son Absalom.

For instance, the PDP-8, having only 8 fixed-length instructions and no microcode at all, is a CISC because of how the instructions work, PowerPC, which has over 230 instructions ( more than some VAXes ) and complex internals like register renaming and a reorder buffer is a RISC, while Minimal CISC has 8 instructions, but is clearly a CISC because it combines memory access and computation in the same instructions.

For example, it may go from having only periodic motions to apparently erratic behavior, as in the transition to turbulence of a fluid.

For this reason it is difficult for the modern scholar to solve the 101st problem even after having studied 100 of Diophantos ’ s solutions ”

For example, Italy allows citizenship almost entirely on the basis of jus sanguinis ( having an Italian Ancestor ).

For example, a drug may influence a secondary clinical endpoint, such as a test result ( blood pressure, glucose or cholesterol levels ), without having the power to show that it decreases overall mortality or morbidity in a population.

For example, the letter ⟨ i ⟩ in the word cinema has a sound-representing function ( representing the sound ) and a pronunciation-marking function ( marking the ⟨ c ⟩ as having the value opposed to the value ).

For example, the case described in degree 4 vertex situation is the configuration consisting of a single vertex labelled as having degree 4 in G. As above, it suffices to demonstrate that if the configuration is removed and the remaining graph four-colored, then the coloring can be modified in such a way that when the configuration is re-added, the four-coloring can be extended to it as well.

Rail fins evolved into being and surged into popularity as riders ( Simon Anderson, most famously ) sought a solution to two major performance issues of a central " single " fin-both related to engagement of the foil: For one, a centrally-mounted fin is tilted up out of the water as the board is leaned over, and thus it loses more and more of its lift as the lean angle increases-if the lean angle is acute enough, the fin's tip can be the only area left in the water ; the tip may then rapidly stall and, having lost its lift, become disengaged from the water, leaving the board's bottom as the only control surface still operating.

For the life of me I cannot understand the logic of having a Governor who is part-time and doesn ’ t live at Government House.