Astronomy Part 1 Flashcards
What does light from a star that is moving towards the Earth do?
Increase in frequency, decrease in wavelength and become blue shifted
What does light from a star that is moving away from the Earth do?
Decrease in frequency, increase in wavelength and become red shifted
What were Hubble’s observations?
Distant galaxies were moving away from us and becoming red shifted
Which theory did Hubble’s observations add weight to?
The Big Bang Theory
What is the most dramatic property of a neutron star?
Its high density
What is the visible edge of a black hole known as?
Event horizon
Where are larger elements created?
Supernovae
What is the heaviest element that comes from our sun?
Iron
What is the order of the final stage for a star with a mass 10 times that of our sun?
Red giant, supernova, neutron star
What is the first step in the evolution of a star?
A dense cloud of dust and gas starts to collapse under its own gravity
What is the second step in the evolution of a star?
The individual clumps grow hotter until they reach 15 million degrees and nuclear fusion begins
What is the third step in the evolution of a star?
The star shines for billions of years by converting hydrogen into helium in its core
What is the fourth step in the evolution of a star?
The central hydrogen runs out and the core collapses and heats up, causing the star to become a red giant
What is the fifth step in the evolution of a star?
The star jettisons its outer atmosphere as planetary nebula
What is the sixth step in the evolution of a star?
The collapsed core survives as a hot white dwarf