What is the greenhouse effect? - NASA Science
The greenhouse effect is the process through which heat is trapped near Earth’s surface by substances known as ‘greenhouse gases.’ Imagine these gases as a cozy blanket enveloping our planet, helping to maintain a warmer temperature than it would have otherwise. Greenhouse gases consist of carbon dioxide, methane, ozone, nitrous oxide, chlorofluorocarbons, and …
NASA Science
NASA Science is Delivering. NASA 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 ...
Solar System Exploration - NASA Science
7. Room to Breathe. Our solar system has many worlds with many types of atmospheres. 8. Ring Worlds. The four giant planets – and at least one asteroid – have rings. 9. Getting Out There. More than 300 robotic spacecraft have left Earth's orbit, and …
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, […]
Introduction to the Electromagnetic Spectrum - NASA Science
2016年8月10日 · What is Electromagnetic energy? Electromagnetic energy travels in waves and spans a broad spectrum from very long radio waves to very short gamma rays. The human eye can only detect only a small portion of this spectrum called visible light. A radio detects a different portion of the spectrum, and an x-ray machine uses yet another portion.
Types of Solar Eclipses - NASA Science
Total Solar Eclipse. Annular Solar Eclipse. Partial Solar Eclipse. Hybrid Solar Eclipse. Solar eclipses occur when the Sun, the Moon, and Earth line up, either fully or partially. Depending on how they align, eclipses provide a unique, exciting view of either the Sun or the Moon. A solar eclipse happens when the Moon passes between the Sun and ...
Asteroids, Comets & Meteors - NASA Science
For the most up to date count of asteroids, and comets in our solar system, please visit NASA/JPL's Solar System Dynamics website. Explore the 3D world of asteroids, comets, and NEOs. Learn about past and future missions, tracking and predicting orbits, and close approaches to Earth. NASA/JPL-Caltech.
Eclipses and the Moon - NASA Science
The Moon and Solar Eclipses. Solar eclipses happen only at the new moon phase, when the Moon is between Earth and the Sun. During a solar eclipse, the Moon casts a shadow on Earth, and blocks or partially blocks our view of the Sun. Though solar eclipses happen as often as lunar eclipses, they are visible from such a small area of Earth each ...
Our Solar System - NASA Science
March 15, 2016. Language. english. Our solar system is made up of a star—the Sun—eight planets, 146 moons, a bunch of comets, asteroids and space rocks, ice, and several dwarf planets, such as Pluto. The eight planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Mercury is closest to the Sun. Neptune is the farthest.
Near-Earth Asteroids as of November 2024 - Science@NASA
2024年11月4日 · Sep 29, 2023. Article. Near-Earth Asteroids as of November 2024. Each month, NASA’s Planetary Defense Coordination Office releases a monthly update featuring the most recent figures on NASA’s planetary defense efforts, near-Earth object close approaches, and other timely facts about comets and asteroids that could pose an impact hazard with ...