Galaxy
A huge collection of gas, dust, and billions of stars and their solar systems is held together by gravity.
what is a galaxy?
An interstellar cloud of dust, hydrogen, helium and other ionized gases, where the life cycle of a star starts.
What are nebulae?
The gravitationally bound system of the collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets.
What is the Solar System?
Objects that orbit the sun between the inner and outer planets, minor planets, especially of the inner Solar System, also called planetoids
What are asteroids?
What scientists use to describe their observations on how galaxies are expanding. Also, the most widely accepted, scientific theory to explain how the universe formed
What is the big bang theory?
What are the 3 main types of galaxies
What is spiral, elliptical, and irregular?
The explosion of a star, it is the largest explosion that takes place in space.
What is a Supernova?
Jupiter, Saturn, Uranus, or Neptune
What are gas, giants?
A small body of matter from outer space that enters the earth's atmosphere, becoming incandescent as a result of friction and appearing as a streak of light.
What is a meteor?
How do you interpret the HR Diagram?
What is by its luminosity and temperature?
What galaxy do we live in?
What is the Milky Way Galaxy?
A region of space having a gravitational field so intense that no matter or radiation can escape.
What is a black hole?
Mercury, Venus, Earth, and Mars
What are terrestrial planets
A meteor that survives its passage through the earth's atmosphere such that part of it strikes the ground
what is a meteorite?
When did the universe begin in an explosion?
What is 13.7 billion years ago?
A type of galaxy having an approximately ellipsoidal shape and a smooth, nearly featureless image.
What is an elliptical galaxy?
Stars are formed in a nebula, nuclear reactions at the center (or core) of stars provide enough energy to make them shine brightly for many years, the exact lifetime of a star depends very much on its size.
what is the life cycle of a star?
What are the closest star to earth and its properties?
What is the yellow average star sized sun made up of hydrogen, helium, oxygen, iron, carbon, and neon?
A small body moving in the solar system that would become a meteor if it entered the earth's atmosphere.
What is meteoroid?
the displacement of spectral lines toward longer wavelengths in radiation from distant galaxies and celestial objects.
What is redshift?
In what kind of galaxy is the Milky Way?
What is a Spiral Galaxy?
a scatter plot of stars showing the relationship between the stars' absolute magnitudes or luminosities versus their stellar classifications or effective temperatures
What is a Hertzsprung-Russell Diagram?
What does our Solar system consist of?
What is the Sun, the 8 planets, comets, asteroids, meteors, meteoroids, meteorites, and moons.
Cosmic snowballs of frozen gases, rock and dust that orbit the Sun. When frozen, they are the size of a small town. When their orbit brings it close to the Sun, it heats up and spews dust and gases into a giant glowing head larger than most planets.
What is a comet?
the displacement of the spectrum to shorter wavelengths in the light coming from distant celestial objects moving toward the observer.
What is blue shift?