It will collect ultraviolet light in the onboard UV spectrograph to determine the composition of Europa’s atmospheric gases and surface materials. Upon its arrival at the Jovian system, the Europa Clipper spacecraft will use remote sensing as it studies Jupiter’s icy moon Europa. Further, because reflectance spectra come in myriad colors and at a finer resolution than what we can see, we can use these spectra to learn much more about how our planet is changing and the composition of other planets. These movements are called reflection, absorption and re-emission spectra and they happen at very specific wavelengths. Because wavelengths in the electromagnetic spectrum are so fine, these tools allow us to quantify the amount of light as it moves. In space exploration, NASA uses remote-sensing tools that are capable of seeing deeper into the electromagnetic spectrum than we can with our eyes. The image on the right was colorized to show details not visible to the naked eye in natural light. These images captured by NASA's Cassini spacecraft of Saturn's moon Enceladus show plumes shooting out from the moon's south pole.
For example, using remote sensing we’re able to detect the jets of water shooting out from Saturn’s moon Enceladus nearly 900 million miles away. When we look out into the solar system and beyond, we use remote sensing to see things far beyond what we can see with our naked eye. But what we can see with the naked eye only tells us part of the story.
These images are one kind of remote-sensing measurement. Remote sensing refers to making measurements without directly touching the object being measured. NASA scientists often use a technique called “remote sensing” to study the composition of different elements and structures on planets. Wear gardening gloves for additional safety. This can be done safely by placing the disc between a book and the edge of a table and breaking the CD along the straight line to ensure a clean break. Safety Note: Break the CDs in half for students.Provide one set of the materials listed above per group.Optional: Candle, splint, and simple chemicals with unique spectra (as detailed in Extensions below) Management Materialsĭuct tape (or any completely opaque tape)Ĥ to 6 light sources (ceiling lights, computer monitors, candles, the sun, etc.) For higher grades, this activity can also be used to discuss advanced spectroscopic topics, such as how NASA research is advancing spectroscopic techniques to teach us more about plant life on Earth. This will be used as a model for how NASA uses spectroscopy to determine the nature of elements found on Earth and other planets. from Wikipedia.īy contrast, if the detector sees photons emitted directly from a glowing gas, then the detector often sees photons emitted in a narrow frequency range by quantum emission processes in atoms in the hot gas, resulting in an emission line.OverviewIn this activity, students will build a spectrometer using basic materials to observe the light emitted and absorbed by several sources. Dips are present at the Fraunhofer line wavelengths.
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