NASA science cast : observing change over time

NASA has been observing changes over time using a wide range of tools and technologies to study the Earth, our solar system, and the universe beyond. These observations provide important insights into how our planet and its environment are changing, as well as how other celestial bodies are evolving over time.

One key area of NASA's observation efforts is Earth science. NASA satellites and instruments collect data on various aspects of our planet, including its atmosphere, oceans, land surface, and ice sheets. This data is then used to study changes such as climate change, sea level rise, melting glaciers, deforestation, and urbanization. NASA also uses airborne instruments and field campaigns to complement satellite observations and provide ground truth data.

NASA's observations of other planets and moons in our solar system have also contributed to our understanding of change over time. For example, NASA's Mars rovers have collected data on the Red Planet's geology, atmosphere, and weather patterns, which has helped scientists better understand how the planet has changed over time. Similarly, NASA's Cassini spacecraft provided insights into the changing surface features and atmosphere of Saturn's moon Titan.

Beyond our solar system, NASA's telescopes and observatories have been used to observe distant galaxies, stars, and other celestial objects. These observations have revealed how these objects have evolved over time, from the earliest days of the universe to the present day.

Overall, NASA's observations of change over time provide valuable information that can be used to better understand the Earth and the universe, and to make informed decisions about our future.