Stars, Galaxies, and the Universe
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| TELESCOPE | A DEVICE BUILT TO OBSERVE DISTANT OBJECTS BY MAKING THEM APPEAR CLOSER
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| VISIBLE LIGHT | ELECTROMAGNETIC WAVES THAT ARE VISIBLE TO THE HUMAN EYE
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| WAVELENGTH | THE DISTANCE BETWEEN THE CREST OF ONE WAVE TO THE CREST OF THE NEXT WAVE
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| SPECTRUM | THE RANGE OF WAVELENGTHS OF ELECTROMAGNETIC WAVES
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| OPTICAL TELESCOPE | A TELESCOPE THAT USES LENSES OR MIRRORS TO COLLECT AND FOCUS VISIBLE LIGHT
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| ELECTROMAGNETIC RADIATION | THE ENERGY TRANSFERRED THROUGH SPACE BY ELECTROMAGNETIC WAVES
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| REFRACTING TELESCOPE | A TELESCOPE THAT USES CONVEX LENSES TO GATHER AND FOCUS LIGHT
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| CONVEX LENS | A PIECE OF TRANSPARENT GLASS CURVED SO THAT THE MIDDLE IS THICKER THAN THE EDGES
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| REFLECTING TELESCOPE | A TELESCOPE THAT USES A CURVED MIRROR TO COLLECT AND FOCUS LIGHT
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| RADIO TELESCOPE | A DEVICE USED TO DETECT RADIO WAVES FROM OBJECTS IN SPACE
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| OBSERVATORY | A BUILDING THAT CONTAINS ONE OR MORE TELESCOPES
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| CONSTELLATION | AN IMAGINARY PATTERN OF STARS IN THE SKY
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| SPECTROGRAPH | AN INSTRUMENT THAT SEPARATES LIGHT INTO COLORS AND MAKES AN IMAGE OF THE RESULTING SPECTRUM
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| APPARENT BRIGHTNESS | THE BRIGHTNESS OF A STAR AS SEEN FROM EARTH
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| ABSOLUTE BRIGHTNESS | THE BRIGHTNESS A STAR WOULD HAVE IF IT WERE A STANDARD DISTANCE FROM EARTH
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| LIGHT-YEAR | THE DISTANCE LIGHT TRAVELS IN ONE YEAR
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| PARALLAX | THE APPARENT CHANGE IN POSITION OF AN OBJECT WHEN SEEN FROM DIFFERENT PLACES
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| HERTZSPRUNG-RUSSELL DIAGRAM | A GRAPH RELATING THE SURFACE TEMPERATURES AND ABSOLUTE BRIGHTNESSES OF STARS
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| MAIN SEQUENCE | A DIAGONAL AREA ON AN H-R DIAGRAM THAT INCLUDES MORE THAN 90% OF ALL STARS
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| NEBULA | THE CLOUD-LIKE REGION OF GASES LEFT OVER IN THE REMAINS OF A SHRINKING, SUN-SIZED STAR
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| PROTOSTAR | A CONTRACTING CLOUD OF GAS AND DUST WITH ENOUGH MASS TO FORM A STAR
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| WHITE DWARF | THE BLUE-WHITE HOT CORE OF A STAR THAT IS LEFT BEHIND AFTER ITS OUTER LAYERS HAVE EXPANDED AND DRIFTED OUT INTO SPACE
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| SUPERNOVA | AN EXPLOSION OF A MASSIVE STAR
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| NEUTRON STAR | THE SMALL, DENSE REMAINS OF A HIGH-MASS STAR AFTER A SUPERNOVA
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| PULSAR | A RAPIDLY SPINNING NEUTRON STAR THAT PRODUCES RADIO WAVES
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| BLACK HOLE | AN OBJECT WHOSE GRAVITY IS SO STRONG THAT NOTHING, NOT EVEN LIGHT, CAN ESCAPE
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| BINARY STAR | A STAR SYSTEM WITH TWO STARS
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| ECLIPSING BINARY | A BINARY STAR SYSTEM IN WHICH ONE STAR PERIODICALLY BLOCKS THE LIGHT FROM THE OTHER
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| OPEN CLUSTER | A STAR CLUSTER THAT HAS A LOOSE, DISORGANIZED APPEARANCE AND CONTAINS NO MORE THAN A FEW THOUSAND STARS
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| GLOBULAR CLUSTER | A LARGE, ROUND, DENSELY-PACKED GROUPING OF OLDER STARS
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| GALAXY | A HUGE GROUP OF SINGLE STARS, STAR SYSTEMS, STAR CLUSTERS, DUST, AND GAS BOUND TOGETHER BY GRAVITY
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| SPIRAL GALAXY | A GALAXY WITH A BULGE IN THE MIDDLE AND ARMS THAT SPIRAL OUTWARD IN A PINWHEEL PATTERN
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| ELLIPTICAL GALAXY | A GALAXY SHAPED LIKE A ROUND OR FLATTENED BALL, GENERALLY CONTAINING ONLY OLD STARS
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| IRREGULAR GALAXY | A GALAXY THAT DOES NOT HAVE A REGULAR SHAPE
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| QUASAR | AN ENORMOUSLY BRIGHT, DISTANT GALAXY WITH A GIANT BLACK HOLE AT ITS CENTER
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| UNIVERSE | ALL OF SPACE AND EVERYTHING IN IT
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| SCIENTIFIC NOTATION | A MATHEMATICAL METHOD OF WRITING NUMBERS USING POWERS OF TEN
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| BIG BANG | THE INITIAL EXPLOSION THAT RESULTED IN THE FORMATION AND EXPANSION OF THE UNIVERSE
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| HUBBLE'S LAW | THE OBSERVATION THAT THE FARTHER AWAY A GALAXY IS, THE FASTER IT IS MOVING AWAY
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| COSMIC BACKGROUND RADIATION | THE ELECTROMAGNETIC RADIATION LEFT OVER FROM THE BIG BANG
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| SOLAR NEBULA | A LARGE CLOUD OF GAS AND DUST, SUCH AS THE ONE THAT FORMED OUR SOLAR SYSTEM
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| PLANETESIMAL | ONE OF THE SMALL ASTEROID-LIKE BODIES THAT FORMED THE BUILDING BLOCKS OF THE PLANET
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| DARK MATTER | MATTER THAT DOES NOT GIVE OFF ELECTROMAGNETIC RADIATION BUT IS QUITE ABUNDANT IN THE UNIVERSE
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| DARK ENERGY | A MYSTERIOUS FORCE THAT APPEARS TO BE CAUSING THE EXPANSION OF THE UNIVERSE TO ACCELERATE
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
bwise
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