LIFE OF A STAR 🌟

BY: STACIA DEUTSCH AND RHODY COHON.

INTRODUCTION. 📕

• Constellations are grouplings of stars.

• Stars gather in groups called galaxies.

• Our solar system is compromised of everything that orbits the sun like planets.

BIRTH OF A STAR  💫

• The unaided human eye can see only a few thousand stars at a time.

• The spectral class types for stars are labeled O,B,A,F,G,K, and M.

• To sort stars, scientists look at their temperatures.

• Our sun is a class G yellow star.

BIRTH OF A STAR ✨

• All stars begin a Nebula.

• Nebulas contain mainly hydrogen gas and a small amount of helium gas.

• Dark nebula clouds are often large.

PROTOSTAR ⭐

• During this phase a new star is called a protostar.

• The energy creates large, powerful jets of gas called bi-polar outflow.

• Sometimes stars form in clusters.

MAIN SEQUENCE OF A STAR.

• A star’s mass determines whether it moves on to the next stage.

• A main sequence star develops a core temperature of millions of degrees.

• As long as the star stays in equilibrium, it will remain a main sequence star.

PARTS OF A STAR 💥

• It takes about 170,000 years for them to make it out of the star.

• Sunspots are dark, cool areas on the photosphere.

• Solar flares are sudden, violent explosions on the sun.

RED GIANT STAGE🌅

• Most red giants are red but others can be orange or yellow.

• Aledebaran, a red giant is one of the brightest stars in the night sky.

• Some red giants may regain stability for a while.

CONVECTIVE ZONE.

• This layer is less dense and cooler than the radioactive zone.

• It takes a single photon only about ten days to reach the next level.

• These convection currents make the surface of the next level.

CORONA.

• The temperature of the corona averages 3.5 degrees. ☀

• This is the collection of gases around the sun.

• It is much hotter than the core.

NUCLEAR FUSIONS.

• Nuclear fusion creates very light, nonelectric charges called neutrinos.

• By studying these neutrinos, scientists learn about fusion inside the stars.

• A proto star cannot begin nuclear fusion without enough mass or heat.

DEATH OF A STAR

• Star enters it’s final life stages as it runs out of fuel.

• Without, fuel a star cannot perform the same amount of nuclear fusion as it once did.

• It cannot stay in equilibrium.

WHITE DWARFS

• A white dwarf temperature slowly cools down over the next billion years.

• It emits very little light.

• At first, white dwarfs are so hot that they still glow.

BLACK DWARFS

• There are no known black dwarfs in our universe.

• All that will remain is a black lump of carbon, known as a black dwarf.

• Scientists think it takes so long for a while dwarf to cool, that no black dwarfs have been created yet.

RED SUPER GIANTS..

• Red super giants begin to die like red giants do.

• Their gravity causes the outer layers to collapse inward.

• Unlike red giants, stellars winds are common and strong on a red super giant.

SUPERNOVAS

• A supernova is caused in the star’s cove.

• The iron is too heavy for fusion to continue.

• The energy is released as extremely bright supernova

QUESTIONS❓

• How do galaxies hold so many stars? (Ch 1-1)

QUESTIONS❓

• How do stars seem to twinkle?(Ch 1-2)

QUESTIONS❓

• Why do stars come in clusters? (Ch 1-3)

QUESTIONS❓

• Why does stars form in hot temperatures? (Ch 1-4)

QUESTIONS❓

• How does gravity pull stars closer??(Ch 2-1)

QUESTIONS❓

• Why can’t astronomers be sure why disk disappear? (Ch 2-2)

QUESTIONS❓

• Why can’t you be sure when you see a brown dwarf? (Ch 2-3)

QUESTIONS❓

• Why are sunspots cool? (Ch 2-4)

QUESTIONS❓

• Why is the collection of corona gases surrounded around the sun? (Ch 3-1)

QUESTIONS❓

• Why do scientists have to use a special measurement for long distances? (Ch 3-2)

QUESTIONS❓

• How do stars get there color? ( Ch 3-3)

QUESTIONS❓

• Why aren’t all giants red? (Ch 3-4)