Space Exploration and Astronomy
Public flashcard deck about Space Exploration and Astronomy. 8 cards.
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What is the name of the most widely accepted theory about the formation of the universe?
The Big Bang Theory is the most widely accepted cosmological explanation of how the universe began. It posits that the universe expanded from an extremely high-density and high-temperature state.
What is a light-year, and what does it measure?
A light-year is the distance that light travels in one year. It measures astronomical distances.
What are the terrestrial planets in our solar system?
The terrestrial planets are Mercury, Venus, Earth, and Mars. They are characterized by their rocky composition and solid surfaces.
What is a black hole, and how is it formed?
A black hole is a region of spacetime with such strong gravitational effects that nothing, not even particles and electromagnetic radiation such as light, can escape from inside it. They are often formed from the collapse of massive stars.
What is the asteroid belt, and where is it located?
The asteroid belt is a circumstellar disc in the Solar System located roughly between the orbits of the planets Mars and Jupiter. It is occupied by numerous irregularly shaped bodies called asteroids or minor planets.
What is the difference between a galaxy and a solar system?
A galaxy is a vast system of stars, gas, dust, and dark matter held together by gravity. A solar system consists of a star and all the objects that orbit it, including planets, moons, asteroids, and comets.