Vocabulary
A giant ball of gas held together by gravity.
What is a star?
The distance light travels in 1 year.
What is a light-year?
A star almost directly above the North Pole, also called the North Star.
What is Polaris?
Regions of strong, magnetic activity
What are sun spots?
There are at least this many galaxies in the universe.
What is 100 billion?
An object whose gravity is so great, no light can escape it.
What is a black hole?
The universe began from one point billions of years ago and has been expanding ever since.
What is the Big Bang Theory?
Astronomers use these to measure distance within our solar system.
What is an astronomical unit?
Hot bubbles of gas ejected from the corona
What is a CME (coronal mass ejection)?
The Milky Way consists of these three things held together by a gravitational pull.
What is stars, gas and dust?
What is a galaxy?
The true brightness of an object.
What is luminosity?
The sky is divided into this many regions.
What is 88?
Charged particles that continually stream away from the sun.
What are solar winds?
Name the four inner planets.
What is Mercury, Venus, Earth and Mars.
What is the radiative zone?
Average distance between the Earth and the Sun.
What is an astronomical unit?
A spectroscope is used to measure a stars three things.
What is temperature, composition and energy?
Name the six layers of a star, starting with the center.
What is the core, the radiative zone, the convection zone, the photosphere, the chromosphere, the corona"
Tell me 4 of the 6 things our Solar System consists of.
What is eight planets, the Sun, dwarf planets, comets, meteoroids, and asteroids.
Apparent surface of a star.
What is the photosphere?
Hot, dense, slowly cooling sphere of carbon.
What is a white dwarf?
The regions of the sky are also called this.
What is constellations?
Sudden increases in brightness, due to violent eruptions.
What are prominences and flares?
Describe 3 facts about the Sun.
Center of the solar system, orbited by 8 planets, emits its own light, is a star, not a solid surface, made of hydrogen and helium, temp on surface 5,500 degrees Celsius, 28 million degrees Celsius.