Future Eclipses - NASA Science
2025年1月3日 · Date Solar Eclipse Type Geographic Region of Visibility; March 29, 2025: Partial: Europe, Asia, Africa, North America, South America, Atlantic Ocean, Arctic Ocean
2024 Total Eclipse: Where & When - NASA Science
2024年11月21日 · A map developed using data from a variety of NASA sources shows the total eclipse path as a dark band. Outside this path, purple lines indicate how much of the Sun will become covered by the Moon during the partial eclipse.
The Effects of Climate Change - Science@NASA
2024年10月23日 · Global climate change is not a future problem. Changes to Earth’s climate driven by increased human emissions of heat-trapping greenhouse gases are already having widespread effects on the environment: glaciers and ice sheets are shrinking, river and lake ice is breaking up earlier, plant and animal geographic ranges are shifting, and plants and trees are blooming sooner.
Planetary Systems - NASA Science
2024年10月22日 · Planetary Systems. Our solar system consists of the Sun, whose gravity keeps everything from flying apart, eight planets, hundreds of moons, and billions of smaller bodies – from comets and asteroids to meteoroids and tiny bits of ice and rock.
The Causes of Climate Change - Science@NASA
2024年10月23日 · Human Activity Is the Cause of Increased Greenhouse Gas Concentrations. Over the last century, burning of fossil fuels like coal and oil has increased the concentration of atmospheric carbon dioxide (CO 2).This increase happens because the coal or oil burning process combines carbon with oxygen in the air to make CO 2.To a lesser extent, clearing of land for agriculture, industry, and other ...
Webb Image Galleries - NASA Science
2024年3月7日 · Taken during instrument calibration, this image helped test Webb’s ability to dig up galactic “fossils.” Ancient galaxies are so far that as space expands, their light has stretched into infrared wavelengths — Webb’s specialty.
What’s Up: December 2024 Skywatching Tips from NASA
2024年12月2日 · Saturn is visible toward the south beginning at nightfall. Look for it to track a bit farther to the west as the weeks go by. Meanwhile, Jupiter reaches opposition on December 7th, meaning it’s at its brightest for the year and visible all night long.
Milankovitch (Orbital) Cycles and Their Role in Earth’s Climate
2020年2月27日 · Obliquity – The angle Earth’s axis of rotation is tilted as it travels around the Sun is known as obliquity. Obliquity is why Earth has seasons. Over the last million years, it has varied between 22.1 and 24.5 degrees with respect to Earth’s orbital plane.
Comets - NASA Science
2024年12月9日 · Overview. Comets are frozen leftovers from the formation of the solar system composed of dust, rock, and ices. They range from a few miles to tens of miles wide, but as they orbit closer to the Sun, they heat up and spew gases and dust into a glowing head that can be larger than a planet.
Cassini: About the Mission - NASA Science
2024年11月3日 · Cassini was one of the most ambitious efforts ever mounted in planetary exploration. A joint endeavor of NASA, ESA (the European Space Agency), and the Italian space agency (ASI), Cassini was a sophisticated robotic spacecraft sent to study Saturn and its complex system of rings and moons in unprecedented detail.