1
1. Only one exists
2. Composed of space and 100 billion galaxies
3. A galaxy is a grouping of millions or billions of stars kept together by gravity
The Universe
Evidences of the Universe Expanding
1) low temp waves indicating explosion occured
2) responsible for movement of dust clouds to form planets and stars
1) Cosmic Background Radiation
2) Gravity
He proposed that Earth and the other planets orbit the sun
(Nickolas) Copernicus
This model suggests that Earth and the other planets orbit the Sun
Enumerate the correct Order of the Planets, from nearest to the Sun and farthest
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune
- The current understanding of how the universe began.
- Explains how the universe developed from a very tiny and dense “singularity”
- This theory states that the universe began from an initial point which has expanded over billions of years to form the universe
- According to this theory, the universe is 13.7 billion years old
Big Bang Theory
Galaxies
He said that the orbit of the planet were to be elliptical
Kepler
This model suggests that the Earth is the center of the universe
Geocentric
The planets Mercury, Venus, Earth, and Mars are classified as ________ planets due to the small, solid, and rocky surfaces.
Terrestrial Planets
Proposed that the Universe is expanding in 1929
Edwin Hubble
Types of Galaxies
1) often appear bluish because they contain many young stars
2) often appear reddish because they contain Many old stars
1) Spiral galaxies
2) Elliptical galaxies
The brightest object in our sky besides the Sun and the Moon
Venus
Kepler’s First Law. Explain.
The orbit of every planet is an ellipse with the Sun at one foci (focus)
The planets Jupiter, Saturn, Uranus, and Neptune are classified as ________ planets due to the larger, gaseous, and lacks solid surfaces.
Jovian Planets
Three Answers:
1) This phenomenon supports Edwin Hubble’s proposal that the Universe is expanding
2) Stars are moving away from the Earth is the ________.
3) Stars moving toward Earth is the ________.
1) the Doppler shift
2) Red Shift
3) Blue Shift
A large cluster of galaxies is called a ________.
Supercluster
This theory suggests that the Solar System was formed from huge, rotating cloud disk of dust and gases
Nebular Theory
Kepler’s Second Law. Explain.
Planets move fast when they are closest to the sun (Perihelion) and move slowest when farthest from the sun (Aphelion)
Earth Facts, three answers:
1) Distance of the Earth to the Sun
2) Age of the Earth
3) ___ largest planet in the solar system
1) 92,000,000 Million miles
2) 4.6 Billion Years Old
3) 5th largest planet in the solar system
- Long wavelength: low frequency
- Short wavelength: high frequency
Doppler Effect
Our solar system is inside this galaxy known as the ________.
Milky Way Galaxy
The age of our solar system is approximately ________.
4.6 billion years old.
Kepler’s third law. Explain
Compares the distance of each planet from the sun and its orbital period
4 Correct Answers:
1) Planet closest to the sun and has very hot temperatures
2) Inner planets and outer planets are separated by an ________.
3) The giant storm on Jupiter is called ________.
4) All of the gaseous outer planets have ________.
1) Mercury
2) Asteroid Belt
3) Great Red Spot
4) Rings