is the science that studies the composition, position, and movements of all objects in space.
a scientist who studies astronomy
not science! It is a belief that the stars influence your life
a pattern of stars arranged as a mythical figure or animal
are parts of constellations. The big dipper is an asterism because it is only part of the constellation ursa major
a constellation always in the night sky because it is around the pole
has the shortest day
has the longest day
rotates in the opposite direction on its side. their sun rises in the west and sets in the east
rotates opposite ( sun rises in the west and sets in the east)
its day is longer than its year. Their day is 243 earth days
average diameter biggest planet
least amount of gravity
most amount of gravity
most amount of moons
has the most extreme temperatures
has no atmosphere
closest to the sun
has an atmosphere like a green house. (CO2). It is the brightest object in the sky
water planet only planet to have life
has famous moons-Io, Europa, Ganymede and Callisto
has great red spot-large hurricane. it also has a strong magnetic field
moon-titan (which is larger than mercury) has rings
very strong winds, a polar cap
described earth to be center of the universe
suggested sun is the center of the universe
has a large dark spot
the spinning of an object around an imaginary object
the number of hours fo daylight
constructed accurate telescopes
discovered moons and rings around planets, planets are musch closer than stars
earth is farthest away from the sun
created laws of planetary motion
-speed of orbit depends on distance
-farther planets have longer orbits
earth is closest to the sun (Jan 3)
the change in direction of the Earth's axis
when the sun is above and below the horizon an equal amount of time
the part of the sun that is visible during a complete solar ecllopse
the view that the earth is the center of the solar system
the type of eclipse that occurs when it is sun, moon, earth
very strong tides, very high and very low, when the sun,earth and moon are lined up
when the sun is at the highest and lowest positions in the sky
the day with the least hours of sunlight
the day with the most hours of sunlight
the motion of an object in a circular or elliptical path (a year)
the apparent slowing, reversal and looping of a planet in its path across the sky
sun, earth , moon
the view that the sun is the center of the universe
an imaginary rotating sphere upon which lie all the objects in the universe (p 567 B.C. science probe 9)
a solar eclipse where the moon is further from the earth creating a ring of fire.
due to the tilt of the earth's axis
caused by the gravitational pull between the earth and the moon and the sun.
when the sun, moon and earth are in a line, there a very high tides, due to the strong gravitational pull.
weak tides, when the sun and moon are perpendicular to eachother with respect to the sun.
..smaller clumps of cooler matter, forced together by gravity, from the nebula.
one of the four planets furthest from the sun, the gas giants, Jupiter, Saturn, Uranus and Neptune
most of the planet is made up of gasses, the outer planets are all gas giants, Jupiter, Saturn, Uranus and Neptune.
The planets closest to the sun; Mercury, Venus, Earth, and Mars also known as the terrestrial planets
one of the dense rocky planets nearest to the sun; Mercury, Venus, Earth, Mars
non-planetary matter, includes asteroids, meteors, and meteorites and comets
any of numerous small celestial bodies composed of rock and metal that move around the sun (mainly between the orbits of Mars and Jupiter)and are too small to be called planets
large meteors that reach the earth's surface and hit the surface
A STREAK OF LIGHT in the sky produced by the burning of a meteoroid in Earth's atmosphere, a falling star. It doesn't hit the ground.
frozen chunks of rocks and metalllic particles that orbit the sun in long elliptical paths
Big splash theory
The Current theory that explains the formation of the moon; it states that, approximately 4.5 billion years ago, the moon was formed as a result of an object approximately the size of mars colliding with earth, causing less dense portions to be blasted into space
rotating nebula theory
Theory of the formation of solar system which includes nebula -collapsingand sun forms, rotates and clumps form-protoplanets-planets p.381-382
He discovered the existence of other galaxies and determined that galaxies are moving away from us
a shift of the spectral lines to longer wavelengths. The greater the red shift, the faster the galaxy is moving away from us
a range of wavelengths,evident by bands of light, seen through a spectroscope. Each chemical element has its own spectrum. (color bands)
an instrument that splits and spreads out light into a spectrum.
big bang theory
the theory that all matter and energy in the universe was compressed into an extremely small volume that 13 billion to 15 billion years ago exploded and began expanding in all directions
the distance light travels in one year
an apparent shift in the position of a star against the background of more distant non-moving stars.
a trigonometric method of determining the position of a fixed point from the angles to it from two fixed points a known distance apart (baseline)
the measurement between two fixed points, used in triangulation. Used to measure the distance of stars. The longest baseline used is the diameter of the earth's orbit.
hydrogen nuclei fuse to form helium nuclei.The reaction releases an enormous amount of energy
cepheid variable stars
are unstable big stars that are 1000x brighter than the sun and the pulse, they have predictable brightness and behavior, brighter=closer, dimmer=further, they are found in most galaxies and are used to determine distance
Amount of light a star actually gives off, recorded at a standard distance
How bright a star appears to be