Science: Stars 💫🌃🌑 Flashcards
After the Big Bang which elements were present?
Hydrogen and helium
What is a light curve?
A graph which shows the brightness of an object over a period of time
A scientist wants to determine the composition of gases in a nebula, what would they use?
Spectral analysis
A scientist wishes to observe a new star in a galaxy but it is obscured by dust, what would they do?
They would use infrared imaging
A scientist observing a supernova wants to determine the time period it takes for it to explode, what would they use?
They would use light curve
What are EM waves?
They are energy waves. They are produced by the vibration of charged particles
What is the speed of light?
300 000km p/second
What was an alternative theory to the Big Bang Theory as to how our universe began?
Steady State Theory
What sort of (thermal) radiation suggested evidence from the Big Bang?
Cosmic microwave background research
How old is our universe?
~ 13.8 billion years
Rank from smallest to largest:
- solar system
- planet
- galaxy
- star
- moon
- solar system: 4
- planet: 2
- galaxy: 5
- star: 3
- moon: 1
Gamma rays, X-Rays, ultra-violet light, infrared light, visible light, microwaves, radio waves and low frequency waves are all waves and part of what spectrum?
Electromagnetic (radiation) spectrum
What is red shift?
Shift toward a longer wavelength
What are the characteristic patterns that you see when looking at light through a spectrophotometer?
Spectral lines
What is the steady state theory?
The universe has always existed and there is no end or beginning, the universe is expanding, matter is continuously being created
