Planet
* All planets appear to move retrograde, or backwards, from time to time
  - are in motion
* All planets have atmospheres but the specific mix of gases in earth's atmosphere is termed air
  - gravity
  - moons
* All planets move about the sun in an elliptical orbit with the sun at one foci
  - in elliptical orbits, having the sun as one focal point
  - around the Sun on elliptical orbits
* All planets move in elliptical orbits, with the sun at one focus
  - paths, with the sun at one focus
  - on ellipses
* All planets orbit the sun except the earth
  - rotate in the same direction as they revolve
  - spin on an axis and orbit the sun
  - travel along their orbits in the same direction
* Any planet emits exactly the same vibrations at all times.
* Every planet circles around the Sun which is at the centre of our solar system
  - follows an oval-shaped path, or orbit, around the sun, called an ellipse
* Every planet has an axis tilt
  - mass and so every planet exerts a gravitational force on nearby objects
* Know the basic features of the solar system.
* Many planets also have moons
  - have atmospheres of some gaseous mixture
* Most planets are huge magnets with magnetic fields that extend far into space
  - follow orbits that are more elliptical than Earth's
* Most planets have bodies in their orbits which are moons
  - magnetic fields lined up with their North and South Poles
  - orbits with very low eccentricity, close to zero
  - move in the Earth's equatorial plane
  - revolve around the Sun in the same plane and in the same direction
* Most planets rotate in the same direction in which they orbit
  - sense as they orbit
  - prograde
  - seem to be dead and unable to support life in any form
* Some planets are much larger than others.
* Some planets have a very large declination, such as Uranus in our solar system
  - ice And are very cold
* Some planets have moons similar to our own
  - that orbit that planet just as the moon orbits the earth
  - natural satellites, called moons
* Some planets have no clouds and therefore abundant samelight
  - several moons
  - their own satellites or orbiting bodies, such as Earth's Moon
* Some planets have very long days or years, and some are very short
  - strong magnetic fields that create even more radiation
  - lack enough carbon to fuel life forms
  - only have an exosphere
  - rotate much more slowly than others
  - take much longer to simply rotate around on their axis
* absorb light from the sun and heat up.
* also exert a gravitational pull on each other, but size matters
  - spin around their own axis, like a spinning top
* are a byproduct of stellar formation
  - few thousands of kilometers across
  - astronomical objects
  - bits of small rocks and asteroids that come together
* are bodies of rock or gas that orbit around a star
  - which orbit around a star
  - celestial bodies
  - closer and appear more as a disk than a point of light
  - complex entities
  - count nouns
  - different in sizes and colors
  - difficult to photograph because they are small and more weakly lit than the moon
  - dignified when they are in signs in which they rule or are exalted
  - energetically related to each other in ways that tend to be repeated throughout life
  - hard to miss They look like very bright stars
  - hotter deeper down
  - indeed common in the universe
  - large objects
* are located in galaxy
  - outer space
  - planetary systems
  - skies
  - universes
  - much smaller with core temperatures and pressures too low for nuclear fusion to occur
  - rounds
* are the abodes of life
  - dominant mass in their area and they carry moons
* are the main source of supplies and goods
  - suppliers and consumers of all the goods that are traded throughout the galaxy
  - objects that can benefit from using high power
  - second largest objects in the solar system
* are too dim and too close to their suns to be seen by today's telescopes
  - to be seen, but can be located by their pull on the stars they orbit
  - typically brighter than most stars
  - used for livings
  - usually more or less spherical in shape, usually bulging slightly at the equator
  - visible every night with Mars still lingering after sunset in the southwest sky
  - warm in their mantles
  - whole systems, even though they contain many sub-systems
  - worlds
* are, of course, in orbit around the sun.
* belong to stars, which in turn are part of galaxies.
* can also revolve around each other, for they are both merely objects that have a mass
  - form from the dust grains
  - have essentially any energy and thus orbit at any distance
  - later form in the circumstellar disc
* change their positions against the background of stars.
* come in different sizes and colors.
* emit in the infrared portion of the spectrum and putout no visible light
  - virtually no radio waves
* explores the motion of a single planet around a star.
* fall around stars, moons fall around planets.
* find their niche, based on how crowded the solar system is and their relative mass.
* follow elliptical paths.
* form by accretion, with some small body accumulating mass through collision
  - hot internal heat from gravitational contraction, collisions, and radioactive decay
  - hot, and lose the heat from their formation over time
  - out of a disk of dust and gas that encircles a newborn star
* generally appear to move toward the east in front of the star background
  - form by collecting dust and rocks that float around in the early solar system
* generally have a rotation period measured in seconds
  - all of the other elements in their crust and core
  - move more slowly across the sky than the stars
* grow by accretion
  - in the disk through the process of accretion
* have a south pole and a north pole
  - egg-shaped orbits, so their distance from the sun varies
  - fragile environments
  - moonses
  - nearly circular orbits, whereas comets have elongated paths around the Sun
  - satellites or moons much like the Earth's moon
* have their own names
  - poles
  - to be the right distance from their sun
* heavenly body
* includes biospheres
  - sections
* involved in opposition aspect tend to reflect off of one another, to mirror one another.
* is the term used for a body in orbit around a star
  - body in orbit around the Sun
* look like disks, or tiny balls.
* middle-level theory that represents planning knowledge.
* move around stars
  - because the gas cloud that originally formed the solar system was spinning
  - on elliptic orbits with the sun at a focal point
* move through constellations as well
  - it because it is one of the constellations on the ecliptic
  - within the zodiac
* orbit at different angles to the sun's equator.
* orbit the sun as a result of the gravitational force of attraction to the sun
  - in curved paths
  - their stars because of the space coupling within the planets and their stars
* orbiting the sun sometimes eclipse other heavenly bodies.
* program for finding the location and apperance of a planet on a given date.
* reflect starlight, while stars shine with their own light.
* represent objects whose diameters are given in arcsec
  - other astronomical objects whose diameters are given in arcsec
* revolve around the Sun in their own orbits
  - like Earth
* rise, the sun rises, and life is always a little different.
* rotate about in on orbits implied by dashed circles
  - on an axis as they revolve around the sun
* rotate, people walk, and apples fall
  - suns shine and expire
* shine by reflected light and circle stars
  - in the sky because they reflect the light of the sun
* shine with a steadier light than stars
* speed up as they approach the sun.
* start as large asteroids that keep gobbling up their neighbors
  - out with different amounts of atmospheric gases
* take different lengths of time to cycle around the sky.
* tend to be among the brightest objects in the night sky
  - brighter than fixed stars
* theoretically generate magnetic fields only if they spin quickly and possess a molten core.
* travel in circular orbits
  - orbits around the Sun
* turn around with varying lengths of time depending on their size.
* wander across the celestial sphere much more slowly than earth satellites.