Comets
What is a comet?
an icy, small Solar System body
What is an asteroid?
minor planets
What is a star?
plasma held together by its own gravity
What is a star system?
a small number of stars that orbit each other
What is a galaxy?
a gravitationally bound system of stars
How does a comet get its tail?
The Sun's heat vaporizes some of the comet's material
carbonaceous, silicaceous, metallic
How many stars are there in our galaxy?
100,000,000,000
What are the types of galaxy?
spiral, barred spiral, elliptical, and irregular
What does a comet orbit?
The sun
How many asteroids are there in our solar system?
Over 150 million
What is the biggest star?
UY Scuti
What are the two types of system?
Stable and chaotic behavior systems
What are spiral galaxies?
disk-shaped with dusty, curving arms
How many comets are in our solar system?
Around 7000
What is the biggest known asteroid?
Dwarf planet cere
What are pairs of stars called?
binary stars
What’s special about HD 98800?
It has 4 stars
What is an irregular galaxy?
an unusual or irregular shape
What are the 3 parts of a comet
a nucleus, a coma, and a tail
What is the average temperature of the surface of an asteroid?
-100°F
What are most stars in the universe?
Red dwarfs
What is special about star system Hd 188753?
It has 3 stars
What’s an elliptical galaxy?
A galaxy that has an ellipse-shaped light profile