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1Write a note on the inner planets.
Answer variants:
Jupiter
Neptune
Mars
Earth
Saturn
Venus
Mercury
Uranus
The first that are to the Sun are called inner planets. They are
 
 
These planets are also called , as they have solid, rocky surfaces forming an inner solar system.
 
The surface and atmospheric composition of inner planets are formed in a similar way and have a similar pattern. Inner planets do not have any around them.
 
2. Write about comets.
 
Comets are lumps of  which revolve around the Sun in . They are visible only when they approach to the Sun. The revolution period of a comet is .
 
Parts of a comet:
 
The body of a comet is of two main parts; .
 
When a comet approaches the sun, the condensed gases and dust particles on the body get , making the head glow. A comet's tail is always directed  the direction of the sun.
 
Halley’s comet is a , which appears after every . Previously, it was seen in the year \(1986\) and will be visible again in the year .