NASA | SDO's Helioseismic and Magnetic Imager (HMI)

The video discusses the sun's influence on space weather, affecting satellites, astronauts, and Earth's systems. It highlights the importance of understanding the sun's magnetic field and how it contributes to space weather. The Helioseismic and Magnetic Imager (HMI) is introduced as a tool to study the sun's interior and magnetic field, similar to how earthquakes help us understand Earth's interior. The video emphasizes the need to map the sun's magnetic field comprehensively, not just focusing on active regions, to better predict space weather impacts.

What is the primary reason we need to understand the Sun's magnetic field?

• To predict solar eclipses

• To improve weather forecasts on Earth

• To mitigate the effects of space weather on technology

• To enhance the brightness of the Sun

How does Helio seismic imagery help scientists?

• By predicting solar flares

• By allowing scientists to see inside the Sun

• By measuring the Sun's temperature

• By providing detailed images of the Sun's surface

What is the analogy used to explain Helio seismic imagery?

• Comparing it to weather forecasting

• Comparing it to sound wave experiments

• Comparing it to ocean wave studies

• Comparing it to earthquake wave analysis

What are active regions on the Sun?

• Areas with no magnetic activity

• Regions with strong magnetic fields

• Zones of high solar temperature

• Parts of the Sun that are always dark

Why is it important to study the entire magnetic field of the Sun?

• Because it affects the Earth's gravity

• Because it influences the Sun's color

• Because it impacts space weather

• Because it changes the Sun's size