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| ALL AROUND THE WORLD, ANCIENT CULTURES CELEBRATED HEROES, GODS, AND MYTHICAL BEASTS BY NAMING GROUPS OF STARS CALLED. |
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| IN ADDITION TO THE 88 OFFICIAL CONSTELLATIONS, THE SKY CONTAINS A NUMBER OF LESS FORMALLY DEFINED GROUPINGS CALLED |
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| ASTRONOMERS MEASURE THE BRIGHTNESS OF STARS USING THIS METHOD |
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Term
| APPARENT VISUAL MAGNITUDES (mv) |
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Definition
| STAR BRIGHTNESSES ARE EXPRESSED IN THIS SYSTEM AND DESCRIBE HOW THE STARS LOOK TO HUMAN EYES OBSERVING FROM EARTH. |
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| A MEASURE OF THE LIGHT ENERGY FROM A STAR THAT HITS ONE SQUARE METER IN ONE SECOND. |
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| A CONVENIENT MODEL OF THE SKY |
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| A COMMON FEATURE OF SCIENTIFIC THOUGHT |
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| APPARENT MOTION IS CAUSED BY A SPECIAL MOTION OF EARTH CALLED |
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| FROM ANY LOCATION ON EARTH YOU SEE ONLY HALF OF THE CELESTIAL SPHERE, THE HALF ABOVE THE... |
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| MARKS THE TOP OF THE SKY ABOVE YOUR HEAD. |
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Term
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Definition
| MARKS THE BOTTOM OF THE SKY DIRECTLY UNDER YOUR FEET. |
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Term
| NORTH CELESTIAL POLE AND SOUTH CELESTIAL POLE |
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Definition
| LOCATED DIRECTLY ABOVE EARTH'S NORTH AND SOUTH POLES. |
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| HALFWAY BETWEEN THE CELESTIAL POLES |
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Term
| NORTH, SOUTH, EAST, AND WEST POINTS |
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Definition
| ARE THE POINTS ON THE HORIZON CLOSEST TO THE CELESTIAL POLES AND THE OTHER POINTS LIE HALFWA BETWEEN THE NORTH AND SOUTH POINTS. |
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Term
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| YOU CAN MEASURE DISTANCES ON THE SKY IN DEGREE, MINUTES OF ARC, AND SECONDS OF ARC. |
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| IS 1/60TH OF A MINUTE OF ARC |
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Term
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| IS THE ANGULAR DISTANCE FROM ONE EGE TO THE OTHER. |
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Term
| CIRCUMPOLAR CONSTELLATIONS |
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Definition
| ARE THOSE THAT NEVER RISE OR SET. |
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Term
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Definition
| THE TURNING OF A BODY ON ITS AXIS. |
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Definition
| MEANS THE MOTION OF A BODY AROUND A POINT OUTSIDE THE BODY. |
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Term
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Definition
| THE SUN MOVES EASTWARD AMONG THE STARS FOLLOWING A LINE CALLED |
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Term
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| IT MARKS THE CENTER LINE AND THE MOTION OF THE SUN, MOON AND THE FIVE VISIBLE PLANETS (MERCURY, VENUS, MARS, JUPITER, AND SATURN) |
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Term
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Definition
| ANY PLANET IN THE SUNSET SKY |
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| ANY PLANET IN THE DAWN SKY |
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Term
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Definition
| THE SUN CROSSES THE CELESTIAL EQUATOR GOING NORTHWARD AT THE POINT CALLED |
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Term
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Definition
| THE SUN IS AT ITS FARTHEST NORTH AT THE POINT CALLED |
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Definition
| SUMMER SOLSTICE CROSSES THE CELESTIAL EQUATOR GOING SOTHWARD AT THE---- |
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Term
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Definition
| AUTUMNAL EQUINOX REACHES ITS MOST SOUTHERPOINT AT THE ----------- |
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Term
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| ABOUT JANUARY 3 EARTH IS A CLOSEST POINT TO THE SUN |
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| ABOUT JULY 5 EARTH ITS MOST DISTANT POINT FROM THE SUN |
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| IT IS THE SUN THAT IS BEING HIDDEN AND THE MOOON THA IS "IN THE WAY" THE MOON IS JUST ABOUT THE RIGHT SIZE TO COVER THE BRIGHT DISK OF THE SUN AND CAUSE |
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Definition
| THE REGION OF TOTAL SHADOW |
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| PARTIAL SHADOW BUT COULD ALSO SEE PART OF THE SUN PEEKING AROUND THE EDGE OF THE MOON. |
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| SOMETIMES WHEN THE MOON CROSSES IN FRONT OF THE SUN IT IS TOO SMALL TO FULLY COVER THE SUN, AND THEN YOU WOULD WITNESS AN ___ |
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Term
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Definition
| OCCASIONALLY YOU CAN SEE THE MOON DARKEN AND TURN COPPER-RED IN A ---IT OCCURS AT FULL MOON WHEN THE MOON MOVES THROUGH THE SHADOW OF EARTH |
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Term
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Definition
| THE ORIENTATION OF THE MOON'S ORBIT IN SPACE VARIES SLOWLY AND AS A RESULT SOLAR AND LUNAR ECLIPSES REPEAT IN A PATTERN CALLED ---LASTING 18 YEARS 11 1/3 DAYS |
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Term
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Definition
| OF AN OBJECT IS THE ANGULAR DISTANCE FROM ONE EDGE TO THE OTHER |
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