The sun's mysterious transition zone holds the key to solar weather
In short: Why does the sun's atmosphere heat up so violently? Most of the energy leaving the sun's surface is converted into heat in a tiny, complex interface. NASA's IRIS mission is designed to peer into this specific region to solve one of the most enduring puzzles in solar physics.
The Interface Region Imaging Spectrograph (IRIS) is a NASA Small Explorer Mission tasked with observing the transition region of the sun. This area serves as a complex dynamic interface between the photosphere and the corona. It is a critical zone where magnetic fields and plasma exert comparable forces, creating a chaotic environment that remains a significant challenge for current scientific understanding. This specific region is a little-understood part of the sun's lower atmosphere. It acts as a bridge between the photosphere and the corona. Scientists are currently struggling to model these dynamics accurately.
The primary scientific mystery involves how the solar atmosphere becomes energized. Within this particular area, most non-radiative energy exiting the sun transforms into radiation and heat. IRIS intends to map plasma and energy movement towards the heliosphere and corona by recording ultraviolet (UV) images and high-resolution spectra. This data is essential for understanding 'Space Weather,' which affects the connection between the sun and Earth. The project aims to trace the flow of plasma into the heliosphere. These observations are currently missing from our existing data. It helps explain the non-thermal energy that creates the solar wind.
Led by Principal Investigator Alan Title at the Lockheed Martin Advanced Technology Center, the mission utilizes a high-resolution UV imaging spectrograph. It is designed to achieve a spatial resolution of 1/3 arcsec and a time resolution of 1 second. The mission is scheduled to launch from Vandenberg Air Force Base on a Pegasus XL rocket, providing the high-fidelity data needed to bridge the gap in our current observations of the solar atmosphere. The launch was scheduled for June 27 at 7:27 p.m. PDT. It will occur during a five-minute window. Live television coverage of the event starts at 6 p.m. PDT.
Opens the Intellect+ feed with this card first. Swipe up for the next one.
Sources
- Summary by Intellect · source: Mission Managers Give Updates on Latest IRIS Launch
- Also: Interface Region Imaging Spectrograph (IRIS)
To cite this card, link to https://intellectplus.co.uk/app/space-mission-managers-give-updates-on-latest-iris-launch.
How we source, check and correct cards: Editorial standards.
General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.
Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?
Related
More in Sun & solar physics · More in Space · Latest · A–Z · All topics
