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Patterns in Motion
5th grade CSA 4 Patterns in the Night Sky
Question | Answer |
---|---|
apparent brightness | is a measure of the brightness of a star or other astronomical object observed from Earth |
absolute brightness/magnitude | allows astronomers to compare the brightness of stars as if they were all the distance of 10 parsecs from Earth. ... One parsec is equal to 3.26 light years |
gravitational field | amount of gravity present on a planet or moon; changes the amount of weight an object has |
gravity | a force that exists between any two objects that have mass; causes object to fall or be pulled to the center of the Earth |
star distance from Earth | the closer the star the bigger and brighter it appears; the farther away the smaller and dimmer it appears |
shadows | Whenever light is not able to go through an object, it creates a dark area around the object. This patch where the light can not reach is called a shadow. |
rotation | the spinning of a celestial body, such as a planet, around an axis |
revolution | the orbiting of an object around another object |
axis | an imaginary line that an object spins or revolves around |
sundial | a device that uses the position of the sun as it casts a shadow to measure time |
constellations | a particular area of the sky; a group of stars |
Sun | Earths closest star. Made of mostly helium and hydrogen. Appears bigger and brighter than other stars due to its closeness to the Earth. |
why do constellations appear to move | the constellations shift gradually to the west. This is caused by Earth’s orbit around our Sun. In the summer, viewers are looking in a different direction in space at night than they are during the winter. |
The sun and stars ______________ to move across the sky, but really it is the Earths rotation and revolution to cause the sky to look different. | appear |