The EMS
EM Spectrum from longest wavelenth to shortest.
Radio, microwave, infrared, visible light, ultraviolet, x-ray, gamma ray.
Where on the HR Diagram are the Blue Giants located?
Top left.
What is a corona?
The outer atmosphere of a star.
Galaxies that appear of rotating disk and stars.
The redshift of an object is the amount by which the spectral lines in the source are shifted to the red.
What is wavelength?
The distance between crests of waves, such as those of the electromagnetic spectrum., The distance from any point on a wave to an identical point on the next wave.
Where on the HR Diagram are the Red Giants and Super-giants located?
Top right.
What is the core?
Layer in which energy is created by fusing atoms of hydrogen into helium.
What type of galaxy is our milky way?
An elliptical galaxy.
What was the universe like after the big bang?
Hot and dense.
The number of waves produced in a given amount of time.
What does the HR diagram show?
The temperature and Brightness of stars.
What is the radiative zone?
The zone of the sun's interior that is between the core and the convective zone and in which energy moves by radiation
What is a galaxy?
Biggest groups of stars, that contains from a few million to many billions
What happened after the big bang?
The universe expanded.
What are radio waves?
The electromagnetic waves with the longest wavelengths and lowest frequencies.
Where on the HR Diagram are hottest stars located?
The left side.
What is the convection zone?
A region of the sun where gases circulate in convection currents, bringing the sun's energy to the surface
How are elliptical galaxies different from spiral galaxies?
The orbits of stars in elliptical galaxies are oriented in all directions.
What is one light year?
The light-year is a unit of length used to express astronomical distances and measures about 5.88 trillion miles.
What is visible light?
The only part of the electromagnetic spectrum seen by the human eye.
What is the life cycle of a star?
Nebula, Star, Red Giant, White Dwarf, and Supernova.
What is the photosphere?
The visible surface of the sun.
The Milky Way Galaxy’s “neighborhood” is called what?
The local group.
What does the big bang theory suggest?
The universe is still expanding.