Big Bang 1
A very hot star of 40,000 deg. F will give the start this color.
What temperature is the color of a blue star?
One explanation for the Big Bang Theory having to do with leftover radiation.
What is the Cosmic Microwave Background Radiation?
A date that is commonly accepted by Big Bang theorists for when the Big Bang took place.
What happened 13-15 billion yrs ago?
As a dense, hot supermassive ball (pinpoint)
How did the Universe Begin (Singularity)?
The explosion of a massive star near the end of its life is known as this.
What is a supernova?
The closer the star the larger the _____angle.
What is parallax?
A Hertsprung-Russell Diagram has this variable on it's Y - AXIS?
What is Brightness / luminosity?
The 2 elements that are Sun is currently made of?
What is Hydrogen & Helium?
Ever since the universe began, the universe has been doing this.
What is expanding?
The type of star our Sun is.
What is a Main sequence star?
A protostar reaches a temperature so hot that nuclear fusion begins.
When is the birth of a star (nebula)?
Most distant galaxies show a RED SHIFT. This is considered EVIDENCE of that the universe is ___________.
What is expanding?
A light-year is a measurement of this.
What is distance?
A Hertsprung-Russell Diagram has which variable on it's X - AXIS?
What is Temperature?
The most widely accepted theory about the origin of the universe.
What is the Big Bang Theory?
Run out of fuel (hydrogen) and collapse.
How will all stars end, regardless of size?
The name of the scientific law that describes:
"Further galaxies are moving at a faster rate than closer ones (Degree of red shift)"
What is Hubble's Law?
According to Redshift, the farther away a galaxy is, the _____________ it is moving away from earth.
What is faster?
Daily double!!
A massive star runs out of fuel, crushing protons and electrons together to form neutrons, causing a supernova explosion.
What is a neutron star?
Steller nebula> proto-star> main sequence star> red giant> planetary nebula> white dwarf> black dwarf
What is the complete cycle of our Sun?
90% of the stars on the H-R Diagram.
What are main-sequence stars?
About 60 % of all known galaxies are ___.
What are elliptical galaxies?
The compression or expansion of light/sound waves as it travels towards or away from the observer.
What is the Doppler Effect?
What is the final element a massive star will produce right before it implodes?
What is Iron - Fe?
Stable middle phases of a stars life, fusing hydrogen into helium, generating energy that balances gravity's inward pull.
What is a main - sequence star?