Vocab 1
A giant ball of gas held together by gravity
What is a Star?
A huge collection of stars
What is a Galaxy?
Innermost layer of the sun
What is the Core?
Regions of strong magnetic activity about the size of Earth
What are Sunspots?
The North Star
What is Polaris?
The true brightness of a star
What is Luminosity?
Spreads light into different wavelengths
What is a Spectroscope?
Second inner layer of the sun
What is the Radiative Zone?
Charged particles that stream continually away from the Sun
What is the Solar Wind?
The amount of galaxies in the universe
What is at least 100 billion; hundreds of billions
The apparent surface of a star
What is the Photosphere?
An object whose gravity is so great that no light can escape it
What is a Black Hole?
Third inner layer of the Sun
What is the Convection Zone?
Huge, hot bubbles of gas ejected from the corona over several hours
What are Coronal Mass Ejections or CMEs?
The Milky Way consists of
What is gas, dust, and stars?
A hot, dense, slowly cooling sphere of carbon
What is a White Dwarf?
Hot gas moves up toward the surface and cooler gas moves deeper into the interior
What is the Convection Zone?
The 4th or innermost outer layer of the Sun; Sun's apparent surface
What is the Photosphere?
Clouds of gas that make loops and jets; can last for weeks
What are Prominences?
The regions the sky is divided into, and the amount
What are Constellations; 88
Measurement used to measure distances within our galaxy
What are Astronomical Units?
Measurement used to measure distances beyond our galaxy
What are Light-years?
5th layer of the Sun
What is the Chromosphere?
Sudden increases in brightness caused by violent eruptions; can last for minutes to hours
What are Flares?
The three characteristics of a star that are studied using a spectroscope
What is temperature, composition, and energy?