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Are Saturn's halos obvious?
Yes
Which planet has the largest number of satellites?
Jupiter
Fill in the blanks: The_____ ______on Mars make it look red.
iron oxide
Fill in the blanks: Earth is protected by the______.It is the only known planet with the existence of _______in the Solar System.
atmosphere, high intelligent living things
Fill in the blanks: Venus is surrounded by a thick_____,so a strong______effect is produced. The average surface temperature is very_____.
atmosphere, greenhouse, high
Fill in the blanks: Mercury is the nearest planet to the_____.It is full of_____, created by_____on the surface.
Sun, craters, meteorites
Name the 8 planets of the Solar System.
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
Give an example of a satellite.
Lo (or other appropiate answers)
Give an example of a Planet.
Earth (or other appropiate answers)
Give an example of a Star.
Sun (or other appropiate answers)
Astronomical objects can be classified into what 3 types?
Stars, Planets, Satellites
Tell me the charateristics of a Satellite.
- non illuminating - revolving around a planet
Tell me the characteristics of a Planet.
- Non-illuminating - revolving around a star
Tell me about the characteristics of a Star.
- illuminating - emitting heat
The Earth is one of the what in the Solar System?
Astronomical Object
The Solar System is one of the what in the Milky Way?
Planetary system
The Milky Way is one of the what in the universe?
Numerous galaxies
What is the basic unit composing the universe?
The galaxy
The radius of Milky Way is about how many light years?
100 thousand light-years
What does Light-year refer to?
It refers to the distance that light travels in 1 year
How many Sun-like objects are there in the Milky Way?
200 to 300 billion
What is the unit of astronomical distances?
Light-year
When was the universe created?
Scientists estimate that it was created 13.8 billion years ago
How was the universe formed?
By a large explosion