Stars and Constellations Flashcards
It is the study of celestial objects, space, and the universe as a whole
Astronomy
It is the study of movement and position of celestial objects and their supposed influence on the lives of human beings
Astrology
It is a branch of science
Astronomy
It is considered as a pseudoscience
Astrology
This refers to the people who study astronomy
Astronomers !! :33
These are people that use astrology to predict future events
Astrologers
A giant cloud of dust and gas in space
Nebula
“Interstellar cloud” or “Nursery of Stars”
Nebula
Located in the constellation Scorpius, about 6,000 light years from Earth
Nebula
Center part of the blob where nuclear fusion takes place
Protostar
Refers to the splitting of a heavy, unstable nucleus into two lighter nuclei
Nuclear Fission
It is the process where two light nuclei combine together, releasing vast amounts of energy
Nuclear Fusion
Continues nuclear fusion
Main Sequence
Stable phase in the life of a star
Main Sequence
Classification of Stars
- Color and Temp
- Size
- Brightness
- Distance
It is the indication of a star’s surface temperature
Color: Blue (Hottest), Red (Coldest)
Classifications of Stars according to size
Giants, super giants, dwarfs, main sequence stars
It is the amount of light that a star radiates
Absolute Brightness
This unit is used to measure the distance of a star from Earth
Light-years
One light year = ?
5.8 trillion miles or 9.4 trillion km
2 categories of stars
- Average
- Massive
Life Cycle of an Average Star
Stellar Nebula - Protostar - Main Sequence - Red Giant - Planetary Nebula - White Dwarf - Black Dwarf
Life Cycle of Massive Star
Stellar Nebula - Protostar - Main Sequence - Red Supergiant - Supernova - Neutron Star or Black
Materials in Star Formation
- Hydrogen gas and dust particles
- Gravity
- Time
A group of stars that form a pattern in the sky
Constellations
How many constellations are there?
88
As the Earth rotates on its axis, its “celestial” north pole remains directly in line with _________
Polaris (“The North Star”)
It aligns with the axis of rotation for the Earth (The North Pole) and stars in the northern hemisphere appear to rotate around it
Polaris
How many major constellations?
7:
1. Scorpius
2. Cygnus
3. Ursa Major
4. Ursa Minor
5. Cassiopeia
6. Orion
7. Draco
Known as “The Scorpion”
Scorpius
Brightest Star: Antares, Best Season to View: Summer
Scorpius
“The Swan”
Cygnus
Brightest Star: Deneb, Best Season to View: All year
Cygnus
“Big Bear”
Ursa Major
Brightest Star: Dubhe and Merak, Best Season: All year
Ursa Major
Patterns in the night sky that are PART of a constellation
Asterism
Examples of Asterisms
Big dipper, little dipper, orion’s belt
