NASA | EUNIS Sees Evidence for Nanoflare Coronal Heating

The video explains the counterintuitive phenomenon of increasing temperatures away from the sun, attributed to the nanoflare heating theory. This theory suggests numerous low-energy nanoflares heat the solar corona. The Eunice instrument, flown on a sounding rocket, captures data to support this theory by observing ion emissions. These observations provide evidence for the nanoflare heating theory, exciting astronomers studying the sun's atmosphere.

What is the counterintuitive observation about temperature as you move away from the sun?

• The temperature decreases.

• The temperature fluctuates randomly.

• The temperature remains constant.

• The temperature increases.

What does the nanoflare heating theory propose?

• The solar corona is heated by external sources.

• The sun's temperature is uniform throughout.

• Low-energy nanoflares heat the solar corona.

• The sun's surface is cooler than its core.

What is the primary purpose of the Eunice instrument?

• To measure the sun's gravitational pull.

• To observe the sun's atmosphere using ultraviolet light.

• To capture images of solar flares.

• To study the sun's magnetic field.

How does the Eunice instrument return to Earth after its mission?

• It remains in orbit.

• It burns up in the atmosphere.

• It parachutes back to the desert.

• It is retrieved by a spacecraft.

What evidence supports the nanoflare heating theory according to the observations?

• The presence of ion 19 and ion 12 emissions.

• The observation of solar flares.

• The absence of any ion emissions.

• The detection of solar winds.