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Space Science Unit

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Galaxies Groups of stars, planets, and space debris Irregular, Elliptical, Spiral Milky Way is our galaxy. Space Exploration Escape Velocity ... – PowerPoint PPT presentation

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Title: Space Science Unit


1
Space Science Unit
  • Integrated Science I
  • Chapter 39 and 40
  • Conceptual Physical Science

2
Phases of the Moon
3
Phases of the Moon
waxing increasing waning
decreasing gibbous gt ½ crescent lt
½
4
Lunar Phases
  • New Moon
  • Waxing Crescent
  • First Quarter
  • Waxing Gibbous
  • Full Moon

5
Lunar Phases
  • Full Moon
  • Waning Gibbous
  • Last Quarter
  • Waning Crescent
  • New Moon

6
Moons Orbit and Phases
7
Rotate vs. Revolve
  • Rotation spin of an object on its axis
  • Revolution orbit of an object around another
    object

8
Why does one side of the moon always face us?
  • Moon rotates once every 27.3 days
  • Moon revolves once every 29.5 days
  • Moons rotation approximately equal to its
    revolution

9
What causes the seasons?
  1. 23.5 tilt of Earths axis
  2. Direct vs. indirect sun rays
  3. Length of daylight

10
Fall
Sun

Summer
Winter
Spring
11
Eclipses
  • Lunar Eclipse
  • Solar Eclipse
  • Total Eclipse

12
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13
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14
A total eclipse of the sun occurs during the day!
Only the corona is visible.
15
Tides
  • Effect of gravity between the moon and the sun

16
Spring Tides
  • When the sun, the moon, and the Earth are all
    aligned in a 180o angle

17
Neap Tide
  • When the sun, the moon, and the Earth form a 90
    angle

18
Measurements in Space
  • Light year distance light travels in one Earth
    year
  • Astronomical Unit distance from Earth to Sun

19
Units of Time from Space
  • Year 1 revolution of Earth
  • Day 1 rotation of Earth
  • Month 1 revolution and/or rotation of Moon

20
Characteristics of the Sun
  • Central star in our solar system around which
    planets revolve
  • Composed of gases (H2 and He) burning at
    15,000,000 o C

21
Solar System Characteristics
  • Inner Planets
  • Mercury, Venus, Earth, Mars
  • Terrestrial planets with atmosphere and crust

22
Solar System Characteristics
  • Outer Planets
  • Jupiter, Saturn, Uranus, Neptune, Pluto
  • Jovian planets have ring systems and gas
    atmospheres (J, S, U, N)
  • Pluto is neither terrestrial or Jovian

23
Characteristics of the Solar System
24
Space Debris
  • Asteroid rocks orbiting in space
  • Asteroid belt located between Mars and Jupiter
  • Separates inner and outer planets

25
Space Debris
  • Meteoroid smallest asteroids
  • Meteor meteoroid striking Earths atmosphere
  • Meteorite meteor that hits Earths surface

26
Space Debris
  • Comet mass of dust and ice with a tail of gases
    (called a coma) orbiting the sun

27
Stars
  • Bodies of gases that give off tremendous amounts
    of radiant and heat energy
  • Constellations are groups of stars used for
    navigation, storytelling, honoring heroes

28
Evolution of Stars
29
Hertzsprung-Russell Diagram
30
Red Shift vs. Blue Shift
  • Red Shift stars moving away from Earth
  • Blue Shift stars moving toward Earth
  • Caused by Doppler Effect

31
Black Holes
  • Remains of a neutron star that has collapsed due
    to intense gravity
  • Event horizon surface of a black hole from
    which light cannot escape

32
How do Black Holes form?
33
Galaxies
  • Groups of stars, planets, and space debris
  • Irregular, Elliptical, Spiral
  • Milky Way is our galaxy.

34
Space Exploration
  • Escape Velocity speed needed to escape Earths
    atmosphere
  • Has led to technology used in daily life

35
How Did We Get Here?
  • Steady-State Theory
  • Plasma Theory
  • Big Bang Theory

36
Are We Alone in the Universe?
  • SETI vs. Pseudoscience
  • If it is just us, it seems like an awful waste
    of space.
  • Ellie Arroway in Carl Sagans Contact
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