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38 Cards in this Set
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planets |
I. Reflect the light falling on them from the sun. They orbit the sun. Points of light in the night sky. They don’t twinkle. They have sufficient mass and gravity to be nearly spherical (round) and able to clear their orbit of dust, rock and other objects.
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stars |
D. Twinkling points of light in the night sky. The light emitted is from nuclear fusion reactions where hydrogen is converted to helium with the release of huge amounts of light, heat and radiation. Contains between 200 and 400 billion stars and is 100,000 light years across.
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moon |
K. Reflects sunlight. Is the biggest and brightest object in the night sky, when visible. |
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milky way |
H. White band of light from more than 200 billion stars |
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solar system |
A. The sun and the planets make up this system |
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terrestrial planets |
L. Rocky with a hard surface. Earth, Mercury, Venus and Mars. |
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gas giant planets |
E. Huge balls of gas with a small and rocky core. Jupiter, Saturn, Uranus and Neptune. |
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meteoroid |
M. A small rock or particle of debris in space. |
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meteor |
B. Meteoroid that enters Earth’s atmosphere and becomes a blazing fireball. |
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meteorite |
G. Part of a Meteor that reaches the Earth’s surface. |
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asteroid |
J. Large rocky objects that orbit the sun and are usually found in a belt between Mars and Jupiter
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comets |
C. Have a head (made of ice, carbon dioxide and other substances) and a long shining tail. They travel around the sun.
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constellations |
F. A group of stars that form pictures or patterns recognised by people around the world. E.g. The Southern Cross.
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dwarf planets |
N. Small objects orbiting the sun on the outer edge of the solar system. E.g Pluto, Haumea, Eris and Makemake. Ceres is an asteroid found in the asteroid belt but also classified as one of these.
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light years |
F. The distance travelled by light in one year. 9.5 trillion (9.5 x 1012) kilometres.
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speed of light |
K.The speed at which light travels in a vacuum. Approximately 299,792.458 km/s OR 299, 792,458 m/s. |
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parallax |
A. A phenomenon that causes you to see different views of the same object. |
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stellar parallax |
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gravity |
X. A force of attraction between any 2 objects in the universe. Small objects exert a weak force while massive objects exert a large force. |
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nuclear fusion |
O. Produces huge amounts of light, heat and radiation when hydrogen atoms are fused together to form Helium atoms. |
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radiation pressure |
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nebulae |
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protostar |
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galaxies |
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black hole |
C. A collapsed star so massive that not even light can escape its gravitational field. As they don’t emit any visible light they are hard to detect. You can find them indirectly by the effect they have on surrounding stars. |
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magnitude |
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Spectrometer
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plasma |
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red giant |
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white dwarf |
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black dwarf |
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blue supergiants |
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supernova |
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neutron star |
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cosmology |
L. The study of the history and structure of the entire universe. |
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astronomy |
B. The study of the stars. Stars vary in age size and appearance. |
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big bang |
U. Theory that the universe began with an enormous explosion of energy. |
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universe |
G. All of space and everything in it including stars, planets, galaxies, etc.
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