Universe
What is the age of the Universe?
13.8 billion
How old is the solar system?
4.6 billion or 4,600 million
What planet can float in water?
Saturn
Its starting mass.
A person that goes into space.
Astronaut
The universe is still expanding.
What is at one focus of every planet's orbit?
The Sun
What are the names of the terrestrial planets?
Mars, Earth, Mercury, Venus
How many stars are there in our solar system?
1 our Sun
A shooting star is an object that burns up in our
Atmosphere
What is the best proof that the universe formed in a big bang?
Cosmic background radiation
What force holds the solar system together?
Gravity
What planet has the most eccentric orbit?
Mercury
What generates the energy inside a star
Nuclear Fusion
Asteroids
Sun is center of our solar system.
Objects that travel from deep in space to orbit the Sun and as they approach the Sun they begin to melt or ionize causing two tails to form behind them are called what?
Comets
What planet has a longer day than it does a year?
Venus
What forms stars?
Nebulas collapse due to gravity.
This star is cooler and brighter than our Sun.
Aldebaran
What happens to the wavelengths of light as a star moves closer to Earth?
They shorten towards the blue.
Why is Pluto not a planet?
Its orbit dips inside Neptunes.
What object is located at one focus of the Moons orbit?
The Earth
What star is about 100,000 times brighter than the Sun and about 2x hotter?
Rigel
A spiral galaxy like our Milky Way that one day will collide with us. It is visible in the night sky, but it looks like a star.
Andromeda galaxy