question: why does the iss move through the sky really quickly yet planets further out barely seem to move?
comment: Objects further away always appear to be moving slower. When a bird flys over your head it zips by quickly. The same bird flying past you 100 feet up looks like it is moving slower.
passages: One example of a transit involves the motion of a planet between a terrestrial observer and the Sun. This can happen only with inferior planets, namely Mercury and Venus (see transit of Mercury and transit of Venus). However, because a transit is dependent on the point of observation, the Earth itself transits the Sun if observed from Mars. In the solar transit of the Moon captured during calibration of the STEREO B spacecraft's ultraviolet imaging, the Moon appears much smaller than it does when seen from Earth, because the spacecraft–Moon separation was several times greater than the Earth–Moon distance. 
   If the smaller planets are to be easily visible to the naked eye, large outdoor spaces are generally necessary, as is some means for highlighting objects that might otherwise not be noticed from a distance. The objects in such models do not move. Traditional orreries often did move and some used clockworks to make the relative speeds of objects accurate. These can be thought of as being correctly scaled in time instead of distance.
  
  Section::::Scale models in various locations.
  
  Many towns and institutions have built outdoor scale models of the Solar System. Here is a table comparing these models.
   Section::::Planets, moons and planetoids.
  
  In the "Star Wars" franchise, almost everyone can breathe and move on many planets, and these, as well as the star systems, are treated as small places. Both defects have an accurate explanation.
   Kepler uses a daemon to describe the island of Levania in many scientific ways. The fixed stars are in the same position as the Earth's fixed stars. The planets appear larger from Levania than from Earth due to the distance Levania is from Earth. Levania also sees planetary motions in a different way. For instance, Levania does not seem to move while the Earth is seen to move just as Earth does not seem to move when on Earth but the Moon is seen to move. This is an example of Kepler defending Copernicus' diurnal rotation. The inhabitants at the divisor see the planets different from the rest of the Moon. Mercury and Venus specifically seem bigger to them.
   Since interplanetary spacecraft spend a large period of time in heliocentric orbit between the planets, which are at relatively large distances away from each other, the patched-conic approximation is much more accurate for interplanetary trajectories than for translunar trajectories. The patch point between the hyperbolic trajectory relative to the departure planet and the heliocentric transfer orbit occurs at the planet's sphere of influence radius relative to the Sun, as defined above in Orbital flight. Given the Sun's mass ratio of 333,432 times that of Earth and distance of , the Earth's sphere of influence radius is (roughly 1,000,000 kilometers).
   Many points of light in the sky have brightness variations that may appear as transiting planets by flux measurements. Difficulties with false detections in the transit photometry method arise in three common forms: blended eclipsing binary systems, grazing eclipsing binary systems, and transits by planet sized stars. Eclipsing binary systems usually produce deep fluxes that distinguish them from exoplanet transits since planets are usually smaller than about 2R but this is not the case for blended or grain eclipsing binary systems.
   BULLET::::- The spacecraft will spend most of its flight time under only the gravitational influence of the Sun, except for brief periods when it is in the sphere of influence of the departure and destination planets.
   The Milky Way is 100,000 light-years across, but 90% of planets with known distances lie within about 2000 light years of Earth, as of July 2014. One method that can detect planets much further away is microlensing. The WFIRST spacecraft could use microlensing to measure the relative frequency of planets in the galactic bulge vs. galactic disk. So far, the indications are that planets are more common in the disk than the bulge. Estimates of the distance of microlensing events is difficult: the first planet considered with high probability of being in the bulge is MOA-2011-BLG-293Lb at a distance of 7.7 kiloparsecs (about 25,000 light years).
   Due to the Sun's gravitational pull, a spacecraft moving farther from the Sun will slow down, while a spacecraft moving closer will speed up. Also, since any two planets are at different distances from the Sun, the planet from which the spacecraft starts is moving around the Sun at a different speed than the planet to which the spacecraft is travelling (in accordance with Kepler's Third Law). Because of these facts, a spacecraft desiring to transfer to a planet closer to the Sun must decrease its speed with respect to the Sun by a large amount in order to intercept it, while a spacecraft traveling to a planet farther out from the Sun must increase its speed substantially. Then, if additionally the spacecraft wishes to enter into orbit around the destination planet (instead of just flying by it), it must match the planet's orbital speed around the Sun, usually requiring another large velocity change.
   E-sail missions can be launched at almost any time with only minor variations in travel time. By contrast, conventional slingshot missions must wait for the planets to reach a particular alignment.
   The hoax claims that the gravitational pull of Jupiter and Pluto combined will cause one to spend a significantly longer amount of time in the air due to an increase in gravitational pull from the distant planets; however, this is incorrect. Although other planets do exert a gravitational pull on humans on Earth, the amount is very small.
   Circumbinary planets show much larger transit timing variations between transits than planets gravitationally disturbed by other planets. Their transit duration times also vary significantly. Transit timing and duration variations for circumbinary planets are caused by the orbital motion of the host stars, rather than by other planets. In addition, if the planet is massive enough, it can cause slight variations of the host stars' orbital periods. Despite being harder to find circumbinary planets due to their non-periodic transits, it is much easier to confirm them, as timing patterns of transits cannot be mimicked by an eclipsing binary or a background star system.
   The only exported features of a SPACE_OBJECT are the agents for encounter and sensor data, as well as the capacity to set a new position. As one object (the spaceship) visits each object in the universe, the sensor data is collected and passed to the visiting object in its encounter agent. There, the sensor data from the sensor_data_agent (that is—the data element items of the sensor_data TUPLE as returned by the sensor_data_agent query) are evaluated against the current object and a course of action is taken based on that evaluation (see `encounter' in SPACE_OBJECT below).
   Mercury, Venus, Earth, and Mars can all appear to cross the Sun, or transit it, from a vantage point on Ceres. The most common transits are those of Mercury, which usually happen every few years, most recently in 2006 and 2010. The most recent transit of Venus was in 1953, and the next will be in 2051; the corresponding dates are 1814 and 2081 for transits of Earth, and 767 and 2684 for transits of Mars.
  
  Section::::Rotation and axial tilt.
   In circumbinary planets, variations of transit timing are mainly caused by the orbital motion of the stars, instead of gravitational perturbations by other planets. These variations make it harder to detect these planets through automated methods. However, it makes these planets easy to confirm once they are detected.
  
  Section::::Established detection methods.:Transit duration variation.
  
  "Duration variation" refers to changes in how long the transit takes. Duration variations may be caused by an exomoon, apsidal precession for eccentric planets due to another planet in the same system, or general relativity.
   The speed of light in the scale model is exactly 10 cm/second, so walking the 50-meter distance from the Earth to Sun "at light speed" takes 8 minutes and 20 seconds. 
  
  Section::::Scale model of Proxima Centauri in Australia.
   BULLET::::- 14 Em – 1,500 light years – Approximate thickness of the plane of the Milky Way galaxy at the Sun's location
  
  BULLET::::- 14.2 Em – 1,520 light years – Diameter of the NGC 604
  
  BULLET::::- 30.8568 Em – 3,261.6 light years – 1 kiloparsec
  
  BULLET::::- 31 Em – 3,200 light years – Distance to Deneb according to "Hipparcos"
  
  BULLET::::- 46 Em – 4,900 light years – Distance to OGLE-TR-56, the first extrasolar planet discovered using the transit method
  
  BULLET::::- 47 Em – 5,000 light years – Distance to the Boomerang nebula, coldest place known (1 K)
   Section::::Unique features.
   In astronomy, a planet's elongation is the angular separation between the Sun and the planet, with Earth as the reference point. The greatest elongation of a given inferior planet occurs when this planet's position, in its orbital path around the Sun, is at tangent to the observer on Earth. Since an inferior planet is well within the area of Earth's orbit around the Sun, observation of its elongation should not pose that much a challenge (compared to deep-sky objects, for example). When a planet is at its greatest elongation, it appears farthest from the Sun as viewed from Earth, so its apparition is also best at that point.
   Much more recently, better measurements of the oblateness of Mars have been made by using radar from the Earth. Also, better measurements have been made by using artificial satellites that have been put into orbit around Mars, including "Mariner 9", "Viking 1", "Viking 2", and Soviet orbiters, and the more recent orbiters that have been sent from the Earth to Mars.
  
  Section::::In science fiction.
   BULLET::::- Are Planetary Systems Filled to Capacity? A Study Based on Kepler Results, Julia Fang, Jean-Luc Margot, February 28, 2013
  
  Section::::System architectures.:Orbital configurations.:Planet capture.
   formula_14
  
  where formula_15 is known as the crossing time, the time it takes for a star to travel across the galaxy once.
   where "D" is the mean distance from the satellite to the central body, and
  
  "m" and "m" are the masses of the central body and satellite, respectively. This value is approximately from Earth's Moon.
  
  A significant portion of the vehicle's flight (other than immediate proximity to the Earth or Moon) requires accurate solution as a three-body problem, but may be preliminarily modeled as a patched conic approximation.
  
  Section::::Translunar flight.:Translunar injection.
   All superior planets are most easily visible at their oppositions because they are near their closest approach to Earth and are also above the horizon all night. The variation in magnitude caused by changes in elongation are greater the closer the planet's orbit is to the Earth's. Mars' magnitude in particular changes with elongation: it can be as low as +1.8 when in conjunction near aphelion but at a rare favourable opposition it is as high as −2.9, or seventy-five times brighter than its minimum brightness. As one moves further out, the difference in magnitude caused by the difference in elongation gradually fall. The maximum and minimum brightness of Jupiter differ by only a factor of 3.3 times, whilst those of Uranus – which is the most distant Solar System body visible to the naked eye – differ by a factor of 1.7 times.
   BULLET::::- Locals are smaller inhabitants of the planets and can appear in greater numbers than the Flockers but are just as dim. They are mostly globular in shape with blinking eyes and little antennae on top of their heads. They do not speak, but they communicate by bouncing, blinking and squeaking. On certain planets, the Locals are geometric shapes: squares, circles and triangles. Locals are always colourful, appealing and friendly.
  
presuppositions: Planets that are further out don't move as fast as the ISS in the sky. 
corrections: Objects that are further away may not appear to move that fast, but in most cases are moving at the same speed, for example a bird can zip over your head quickly, but a bird really high in the sky can as well but doesn't appear to move as quickly.
raw_presuppositions: Planets that are further out don't move as fast as the ISS in the sky.  Planets that are further out don't move as fast.
raw_corrections: Objects that are further away may not appear to move that fast, but in most cases are moving at the same speed, for example a bird can zip over your head quickly, but a bird really high in the sky can as well but doesn't appear to move as quickly. By definition, planets that are further out don't seem to move as fast, though they may be moving at the same speed.