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Each asteroid and comet is unique. But what makes them unique, and why are these space objects so interesting to scientists? Learn about the first spacecraft to visit an asteroid, what gives… Read More →

How many dwarf planets are in our solar system? What makes them different from planets? And how long does it take them to go around the Sun? From Pluto to Haumea, discover what scientists… Read More →

The Moon is our neighbor in space. And its orbit is slowly moving farther away from Earth each year. Learn about the Moon’s phases, the history of exploring the Moon, what we have discovered… Read More →

The Sun is important for life on Earth. And it's much larger than the planets! From how the Sun formed to the spacecraft that have studied the Sun, learn all about the huge star at the center Read More →

The third planet from the Sun, Earth is our home and the only planet we know of that holds life. Learn how Earth and the Moon orbit the Sun together, how continents form, and how the… Read More →

Jupiter is our solar system’s largest planet. And it has a huge storm called the Great Red Spot! Discover what makes this planet a gas giant. Then learn about its moons and rings and the… Read More →

Mars is known as the Red Planet. It is the fourth planet from the Sun and the only planet where humans have landed rovers. From the biggest volcano in the solar system to ancient riverbeds,… Read More →

Mercury is the smallest planet in our Solar System. And it’s the fastest planet! Learn how Mercury is like Earth’s Moon. Then discover the history of exploring Mercury, what we have found on… Read More →

Neptune, the farthest planet from our Sun, is a dark and windy planet. It’s so far away from Earth that only one spacecraft has visited it! From what makes Neptune an ice giant to its winds,… Read More →

Saturn is known for its rings. But there is so much more to explore of this gas giant! Learn about Saturn’s moons, storms, and clouds, and find out what we have learned from the spacecraft… Read More →

With seasons that last for decades, Uranus is a planet of extremes! The seventh planet from the Sun is one of the two ice giants in our solar system. From what makes Uranus an ice giant to… Read More →

Venus is the hottest planet in our Solar System. And it’s often called Earth’s twin! Discover why Venus is so hot. Then learn about Venus’s volcanoes and clouds and how we use spacecraft to… Read More →