Absolute Magnitude

1
Absolute Magnitude

• The actual brightness of a star.

2
Apparent Magnitude

• How bright a star appears to be in the night sky.

3
Asteroid

• A large space rock that orbits the sun.

4
Axis

• The imaginary line that passes through the center
  of the North and South poles.
• The Earth rotates on its axis.

5
Black Hole

• An object in space with gravity so strong that it
  pulls everything into it, even light.

6
Comet

• A mountain-size chunk of ice and dust that orbits
  the sun

7
Constellation

• A group of stars that ancient people thought
  formed a picture in the sky

8
Corona

• The Suns atmosphere.

9
Earth

• The only planet in our Solar System with the
  right environment to exist.
• ¾ of the planet is covered in water.
• The only planet with liquid water.

10
Eclipse

• The passing of one object between the Sun,
  causing a shadow.
• Examples solar and lunar.

11
Elliptical

• Having the shape of an oval. (egg)

12
Equinox

• Day of equal hours of day and night
• March 21(first day of spring)
• September 21(first day of fall)

13
Galaxy

• A group of stars, gas, and dust.

14
Geographic Pole

• An imaginary point through which the Earths axis
  of rotation passes.

15
Heliocentric Model

• The model that the Sun is the center of the Solar
  System.

16
Light Year

• The distance light travels in one Earth year.
• 9.5 trillion km.

17
Lunar Eclipse

• The Earth blocks the Suns light and casts a
  shadow on the moon.

18
Magnetic Pole

• An imaginary point through which the Earths
  magnetic axis passes.

19
Magnitude

• Brightness of stars.
• Absolute and Apparent.

20
Moon Phases

• New moon, waxing crescent, first quarter, waxing
  gibbous, full moon, waning gibbous, third
  quarter, waning crescent, new moon.
• Lunar Cycle- 27.3 days.

21
Orbit

• The path of an object in space as it travels
  around another object.

22
Order of the Planets

• My - Mercury
• Very - Venus
• Eager - Earth
• Mother - Mars
• Just - Jupiter
• Sent - Saturn
• Us - Uranus
• Nine - Neptune
• Pizzas - Pluto

23
Photosphere

• The visible surface of the Sun.

24
Revolve, Revolution

• The movement of an object around another object.
• orbit
• It takes the Earth one year to make one
  revolution around the Sun.

25
Rotate, Rotation

• The spin of something on its axis.
• It takes the Earth one day to make one rotation.
  (23 hours, 56 minutes)

26
Satellite

• A natural body, like the moon, or an artificial
  object that orbits another object.

27
Seasons

• The year long cycle of temperature changes caused
  by the Earths tilt as it revolves around the Sun.

28
Solar Eclipse

• Moon blocks the Suns light and casts a shadow on
  the Earth

29
Solar Flare

• A brief burst of energy from the Suns
  photosphere.

30
Solar System

• A set of planets, moons, asteroids, and comets
  that are held together by the gravity of a star.

31
Solar Wind

• A fast moving stream of particles thrown into
  space by solar flares.

32
Solstice

• Longest and Shortest Day
• Dec 21 (first day of winter) least amount of
  daylight
• June 21 (first day of summer) most amount of
  daylight

33
Star

• A large, gaseous, self-luminous body held
  together by gravity.

34
Sun

• The huge, fiery-hot star at the center of our
  Solar System.
• The sun gives off light and heat energy.
• Without the Sun, life on Earth could not exist.
• Causes weather

35
Sunspot

• A dark spot on the photosphere of the Sun, cooler
  than the area around it.

36
Telescope

• An instrument that magnifies distant objects,
  making them appear larger.
• Uses a refracted convex lens.

37
Universe

• Everything that exists planets, stars, dust,
  gases, and energy.