NASA Science
WEBNASA Science is delivering: every second of every day, of every week, of every year. 2024 is proving to be yet another year of exceptional scientific discovery and achievement. From soft landing back on the Moon a few months ago, to celebrating the Heliophysics Big Year and a Total Solar Eclipse in the contiguous United States, to receiving ...
Solar System Exploration - NASA Science
WEBOur solar system has eight planets, and five dwarf planets. About 1.4 million asteroids, and about 4,000 comets are in our solar system. 3. Lots of Moons. Our solar system has more than 200 planetary moons. 4. Meet Me in the Milky Way. Our solar system is in one of the Milky Way galaxy’s spiral arms called the Orion Spur. 5.
Mercury - NASA Science
WEBBut Mercury is the fastest planet, zipping around the Sun every 88 Earth days. Mercury is appropriately named for the swiftest of the ancient Roman gods. Get the Facts. NASA's Mercury MESSENGER took this image of Mercury's southern hemisphere. The bright rayed crater near the limb is Debussy, named for the impressionist era French composer.
Mars Facts - Science@NASA
WEBMars has a dense core at its center between 930 and 1,300 miles (1,500 to 2,100 kilometers) in radius. It's made of iron, nickel, and sulfur. Surrounding the core is a rocky mantle between 770 and 1,170 miles (1,240 to 1,880 kilometers) thick, and above that, a crust made of iron, magnesium, aluminum, calcium, and potassium.
Stars - NASA Science
WEBStars form in large clouds of gas and dust called molecular clouds. Molecular clouds range from 1,000 to 10 million times the mass of the Sun and can span as much as hundreds of light-years. Molecular clouds are cold which causes gas to clump, creating high-density pockets. Some of these clumps can collide with each other or collect more matter ...
James Webb Space Telescope - NASA Science
WEBDec 25, 2021 · 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 …
What Is Climate Change? - NASA Science
WEBClimate 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, …
Hubble Space Telescope - NASA Science
WEBThe Hubble Space Telescope is a testament to that concept. Its design, technology and serviceability have made it one of NASA's most transformative observatories. From determining the atmospheric composition of planets around other stars to discovering dark energy, Hubble has changed humanity's understanding of the universe. Mission Type.
Galaxies - NASA Science
WEBGalaxies 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 […]
The Causes of Climate Change - Science@NASA
WEBIn its Sixth Assessment Report, the Intergovernmental Panel on Climate Change, composed of scientific experts from countries all over the world, concluded that it is unequivocal that the increase of CO 2, methane, and nitrous oxide in the atmosphere over the industrial era is the result of human activities and that human influence is the principal driver of many …