Smallest to largest; galaxy, solar system, asteroid and universe
Asteroid, solar syatem, galaxy, universe
Which of the following is a distance?
A) 500 ly
B) 500 years
500ly
Astronomy
The study of the universe
Light-year
Distance light travels in a year
Massive
Containing Mass
Satellite
A body that orbits another body
Scientific Method
Is a systematic way of testing new ideas
Hypothesis
An idea that can explain a phenomenon
Falsified
Proven wrong
Theory
Hypothesis which test have failed to disprove
Cosmological principle
The testable assumption that the same physical laws that apply here and now also apply everywhere and at all times
Occam's Razor
The principle that the simplest hypothesis is the most likely
T/F: A light year is the distance light travels in one year?
True
The milky way galaxy?
Contains about 100 billion stars
How may cm in a km?
100000