The Inner Planets

How big is Deimos?

15 Km in diameter.

How big is Phobos?

27 Km in diameter.

Where did most of the info come from about Mercury?

A single probe, Mariner 10. It flew by Mercury three times in 1974 and 1975.

What are some features of the inner planets?

Are small and dense and have rocky surfaces.

Why did people think it looked like plants were growing on Mars?

Certain regions look darker because there is many dust storms which changes how much dust is in a certain area compared to others.

What are the names of mars' moons?

Deimos and Phobos.

What are the seasons like on Mars?

During the Martian winter, an ice cap grows larger as a layer of frozen carbon dioxide covers it. When one ice cap is growing the other is shrinking because of opposite seasons.

Who is Percival Lowell?

Is an American Astronomer, who convinced many people that these lines are canals built by intelligent martians to carry water.

Why does Mars have seasons?

Mars has seasons because Mars has a tilted axis.

How many moons does Mars have?

Mars has two small moons.

What is Mercury's atmosphere like?

Mercury has virtually no atmosphere. Mercury's high daytime temps cause case particles to move very fast. Because Mercury's mass is small its gravity is weak. Fast moving gas particles can easily escape into space.

What is Mercury?

Mercury is the smallest terrestrial planet and the planet closest to the sun.

What is Mercury?

Mercury is the smallest terrestrial planet and the planet closet to the sun.

What is the largest volcano in Mars?

Olympus Mons and is the largest volcano in the solar system. It covers as the state of Missouri and nearly three times as tall as Mount Everest.

Who is Giovanni Schiaparelli?

Schiaparelli announced that he had seen long, straight lined on Mars. He called them canale, or channels.

Where do scientist think the water is in Mars?

Scientist think that a large amount of liquid water flowed on Mar's surface in a distant past.

Where is Mars water now?

Some of it is located in the planet's two polar caps, which contain frozen water and carbon dioxide. Some of it is in the atmosphere and scientist think it is mostly frozen and underground.

What are the volcanoes like on Mars?

Some regions of Mars has giant volcanoes. Astronomers see signs from lava flows, but all of the volcanoes are extinct now.

What are the three main layers of the Earth?

The three main layers of the Earth is crust, mantel, and core.

What is the greenhouse effect?

The trapping of heat by a planet's atmosphere.

Why is Mars called the "red planet"?

There is a reddish tinge at night when you see it from Earth. The reddish color is from break down of the iron rocks.

What is Venus's rotation?

Venus takes about 7.5 Earth months to rotate around the sun and about 8 months for one oration on its axis. This makes there days longer then there years.

What is Venus's atmosphere like?

Venus's atmosphere is so thick that it is always cloudy there. From Earth or space, astronomers can only see smooth could cover Venus. The clouds made mostly of droplets of sulifric acid.

How are Venus an mars similar?

Venus's density an internal structure are similar to Earth's. But in other ways, venus and Earth are very different.

What is unique about the Earth?

We have liquid water at the surface.

What is Mars's atmosphere like?

The atmosphere of Mars is more than 95 precent carbon dioxide. It is similar in composition to Venus's atmosphere, but much thiner.

What is a terrestrial planets?

The name often given to the four inner planets: Mercury, Venus, Earth, and Mars.