Stars and Constellations Study guide
How long can small stars live up to?
100 billion years.
How long can super massive stars live up to?
100 million years.
How hot are blue stars?
20,000 degrees Celsius.
How hot are red stars?
3,200 degrees Celsius
How hot are yellow stars?
5,800 degrees Celsius
How many stars are Main Sequence?
90% of stars are Main Sequence stars.
What is a main sequence star?
A main sequence star is a diagonal area on an H-R diagram that includes more than 90% of all stars. In main sequence stars they're hydrogen and helium.
What is a nebula?
A nebula is a large cloud of gas and dust in space, spread out in an immense volume. A nebula is also where stars form.
When does a planetary nebula form?
A planetary nebula forma when a red giant star ejects its outer layers as clouds of luminescent gas, revealing the dense, hot, and tiny white dwarf star at its core.
What is a protostar?
A protostar is a contracting cloud of gas and dust with enough mass to form a star.
what are stars absolute brightness?
A star's absolute brightness is the brightness the star would have if it were at a standard distance from earth.
What are stars apparent brightness?
A stars apparent brightness is it's brightness as seen from earth.
What is a supernova?
A supernova is the brilliant explosion of a dying supergiant star.A supernova is formed when iron forms in the core.
What are asterisms?
Asterisms are a noticeable pattern or group of stars that are found in a constellations but are popular by itself, typically having a popular name but smaller than a constellation.
How astronomers use constellations?
Astronomers use the patterns of constellations to locate other objects in the night time sky.
What are circumpolar constellations?
Circumpolar Constellations are visible all year. These constellations are Ursa Major, Ursa Minor, Cassiopeia, Cepheus and Draco.
What are constellations?
Constellations are groups of stars that form imaginary pictures of animals and people.
What are constellations used for?
Constellations are used for direction. Constellations were also used as a calendar If you are ever lost you can always count on stars and constellations.
What are most stars?
Main sequence stars.
What are stars made up off?
Stars are made up of Hydrogen and Helium.
What are the winter constellations?
The winter constellations are Taurus, Sirus,Canis Minor, Canis Major, Gemini, Perseus, Andromeda, Orion, Cetus, Pleiades, Auriga, Lepus.
How many constellations are there?
There are 88 constellations
Big Dipper
What constellation is this?
Canis Major
What constellation is this?
Orion
What constellation is this?
Taurus
What constellation is this?
What did ancients see when they looked up at the night time sky?
When ancients looked up in the sky they saw constellations .But at the time they thought they formed imaginary people and animals.