NASA's Solar System Explorer

Venus's atmosphere is made mostly of carbon dioxide, which traps heat like a greenhouse. This phenomenon is known as the greenhouse effect. The high concentration of carbon dioxide in Venus's atmosphere creates a thick layer that prevents heat from escaping back into space, causing the planet to have extremely high temperatures.

The moon orbits the Earth once every 28 days or so. This is the average length of its lunar cycle, known as a synodic month. During this time, the moon completes a full cycle of phases, going from new moon to full moon and back again.

Asteroids orbit between Mars and Jupiter.

The correct answer is 99.85%. This means that the sun contains 99.85% of the matter in the solar system. This indicates that the sun is by far the largest and most massive object in our solar system, containing the majority of the mass and gravitational pull.

The sun shines 11 times brighter on Mercury than the Earth because Mercury is much closer to the sun than Earth. The intensity of sunlight decreases with distance, so being closer to the sun means that Mercury receives more sunlight and appears brighter.

The moon's gravity helps smooth out Earth's wobble on its axis.

Mars had lots of water at one time, and no one knows what happened to it.

Vesta, a large asteroid, may have had a liquid rock core at one time. This suggests that the asteroid was once molten, possibly due to the heat generated from its formation or from subsequent impacts. The presence of a liquid core could have influenced the geological processes and evolution of Vesta, including the formation of its surface features and the differentiation of its interior.

Jupiter is referred to as a mini solar system because it has many moons and a large magnetic field, similar to the characteristics of our solar system. Just like how our solar system consists of multiple planets and smaller celestial bodies orbiting around the sun, Jupiter has numerous moons orbiting around it. Additionally, its strong magnetic field resembles the sun's influence on the planets in our solar system. Therefore, Jupiter's resemblance to a mini solar system is due to its moons and magnetic field.

Juno is a solar powered spacecraft that will orbit Jupiter 33 times to gather information about the planet.

Callisto has more craters than any other object in the solar system. This means that it has experienced more impacts from asteroids and other celestial bodies over its lifetime compared to other objects. The high number of craters suggests that Callisto's surface is very old and has not been significantly modified by geological processes.

Titan, one of Saturn's moons, is known to have rivers of liquid methane. Methane is a compound found in natural gas and is commonly known as a greenhouse gas on Earth. On Titan, the extremely cold temperatures allow methane to exist in its liquid form, creating rivers and lakes. This discovery has provided valuable insights into the unique geology and potential for life on this moon.

Methane in the atmosphere of Uranus absorbs red light and reflects blue light, giving the planet its distinct blue color. This is due to a process called Rayleigh scattering, where shorter wavelengths of light (such as blue) are scattered more easily by the molecules in the atmosphere. As a result, the blue light is scattered in all directions, making Uranus appear blue to observers on Earth.

A comet's tail is made of water vapor. When a comet gets closer to the sun, the heat causes the frozen water on the comet to turn into gas, creating a glowing tail. This tail is composed of water vapor, along with other gases and dust particles that are released from the comet's nucleus. As the comet moves through space, the solar wind pushes the tail away from the sun, creating the characteristic curved shape.

The Earth has a magnetic field that acts as a protective barrier against storms of particles from the sun. This magnetic field is generated by the movement of molten iron in the Earth's outer core. It extends from the Earth's interior into space and helps to deflect and trap charged particles, preventing them from reaching the surface. This magnetic field is essential for the survival of life forms on Earth as it shields the planet from harmful solar radiation and solar wind.

Io is described as an interesting moon because it not only resembles a pizza in shape, but it also has active volcanoes on its surface. This means that there are volcanic eruptions occurring on Io, which makes it a unique and fascinating celestial body.

Enceladus, one of Saturn's moons, shoots jets of ice water and water ice into space. This phenomenon could explain why the person is feeling thirsty, as the mention of the jets of ice water and water ice suggests that there is a presence of water on Enceladus.

Triton orbits in the opposite direction to the rotation of Neptune.

Ceres is an asteroid that is about 600 miles across.

Scientists would like to study below Europa's icy surface to examine the liquid oceans for signs of life. This is because liquid water is a key ingredient for life as we know it. The presence of liquid oceans on Europa suggests the possibility of habitable conditions and the potential for the existence of microbial life or other forms of life. By studying the liquid oceans, scientists hope to gather evidence of any signs of life that may exist on Europa.

Ganymede is larger than the planet Mercury.

Neptune takes 165 Earth years to make one trip around the sun. This means that it completes one orbit around the sun in the span of 165 Earth years.

The Cassini spacecraft, that orbits Saturn, launched the Huygens Probe into Saturn's largest moon, Titan.

In the given question, it is stated that Rosetta will reach comet Churyumov-Gerasimenko. The answer provided, 2014, indicates that the year in which Rosetta will reach the comet is 2014.

Remember--Jupiter is a gas giant.

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