Solar System Exploration - NASA Science
If you don't find what you are looking for, please try searching above, give us feedback , or return to the main site . NASA explores the unknown in air and space, innovates for the benefit of humanity, and inspires the world through discovery. The solar system has one star, eight planets, five dwarf planets, at least 290 moons, more than 1.3 ...
James Webb Space Telescope - NASA Science
The James Webb Space Telescope is a giant leap forward in our quest to understand the Universe and our origins. Webb is examining every phase of cosmic history: from the first luminous glows after the Big Bang to the formation of galaxies, stars, and planets to the evolution of our own solar system. Learn about the 4 main science themes for Webb.
What Is Climate Change? - NASA Science
Climate change is a long-term change in the average weather patterns that have come to define Earth’s local, regional and global climates. These changes have a broad range of observed effects that are synonymous with the term. Changes observed in Earth’s climate since the mid-20th century are driven by human activities, particularly fossil fuel burning, […]
Mercury: Facts - NASA Science
Mercury is the second densest planet, after Earth. It has a large metallic core with a radius of about 1,289 miles (2,074 kilometers), about 85% of the planet's radius. There is evidence that it is partly molten or liquid. Mercury's outer shell, comparable to Earth's outer shell (called the mantle and crust), is only about 400 kilometers (250 ...
Sun - NASA Science
The connection and interactions between the Sun and Earth drive the seasons, ocean currents, weather, climate, radiation belts and auroras. Though it is special to us, there are billions of stars like our Sun scattered across the Milky Way galaxy. The Sun has many names in many cultures. The Latin word for Sun is “sol,” which is the main ...
Hubble Space Telescope - NASA Science
NASA explores the unknown in air and space, innovates for the benefit of humanity, and inspires the world through discovery. Since its 1990 launch, the Hubble Space Telescope has changed our fundamental understanding of the universe.
Galaxies - NASA Science
Galaxies consist of stars, planets, and vast clouds of gas and dust, all bound together by gravity. The largest contain trillions of stars and can be more than a million light-years across. The smallest can contain a few thousand stars and span just a few hundred light-years. Most large galaxies have supermassive black holes at […]
Facts About Earth - NASA Science
8.350022 minutes. While Earth is only the fifth largest planet in the solar system, it is the only world in our solar system with liquid water on the surface. Just slightly larger than nearby Venus, Earth is the biggest of the four planets closest to the Sun, all of which are made of rock and metal. Earth is the only planet in the solar system ...
Sun: Facts - NASA Science
From our vantage point on Earth, the Sun may appear like an unchanging source of light and heat in the sky. But the Sun is a dynamic star, constantly changing and sending energy out into space. The science of studying the Sun and its influence throughout the solar system is called heliophysics. The Sun is […]
Where Are They Now? - NASA Science
Where Are They Now? Both Voyager 1 and Voyager 2 have reached "interstellar space" and each continue their unique journey deeper into the cosmos. In NASA's Eyes on the Solar System app, you can see the actual spacecraft trajectories of the Voyagers updated every five minutes.
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