if the sun is a medium sized star why does it appear so big to us?
it appears that way because it is so close
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how large can a solar flare be
up to 1 billion km or 386 million square mi
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star
a glowing ball of hot gas
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fusion
the combining of atoms
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the life span of most stars are
10 billion years
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explain the sun spot cycle
they reappear every 11 years in the same spot. they form and disappear within a 2 week period. so can last up to a year
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how long does a typical solar prominece last
usually an hr from start to finnish however it can last for months
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light-year
the distance light travels in a year
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apparent magnitude
how bright a ster looks from Earth
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the stages of a star
1. nebula- a cloud of hydrogen and gas
2. baby star- the hydrogen compacts, fuses into helium explodes & begins burning
3. star- burns brightly and gives off heat
4. giant or supergiant- the helium core cools & shrinks. it glows brightly but gives off little heat
5. white dwarf- the star cools and contracts
6. black dwarf- completely collapes in on itself. (other ways it can die: black hole or supernova
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why are sunspots found in groups
a magnetic attraction towards each other
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why can solar flares be harmful
the radition can be harmful to people and disrupt radio waves and compasses on Earth
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universe
all of space and everything in it
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red giant
a large, cool star that has expanded from the star of an adverge mass
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how old is our sun and how long is one solar day
a solar day is 25 Earth days and our sun is 4.6 billion years old
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what is the relation between the color of the star and its temp.
each color is a different temp. blue/white is th hottest it is 12,000 degrees c. the coolest color is red it is 3,000 degrees c.
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what does a solar prominence look like
rose colored cloud of gas that loops up and turns back toward the suns surface
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mass
the amount of matter in an object
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supernova
the bright explosion of a supergiant star
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1. where is the suns energy produced?
2. why is the distance from the sun so important?
1. the core
2. scientists call it the "goldilock zone" because it we were any closer all the water would evaporate. if we were any farther everything would freeze
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what causes solar flares and what are they
they are a sudden burst of energy in the form of fire that erupts on the suns surface. it is created by magnitic storms caused by solar winds and sun spots