NASA | SDO: Three Years in Three Minutes--With Expert Commentary

The video from NASA's Goddard Space Flight Center showcases the sun's activity over three years, observed by the Solar Dynamics Observatory. It highlights features like lunar transits, solar flares, and the sun's rotation. The video explains solar differential rotation, the solar activity cycle, and the observation of the sun in various wavelengths, revealing sunspots, magnetic fields, and solar wind. It also covers the rare Venus transit, providing insights into these astronomical phenomena.

What is the phenomenon called when the moon passes between the sun and the SDO spacecraft?

• Lunar transit

• Solar eclipse

• Solar transit

• Lunar eclipse

What wavelength is used to observe the solar atmosphere at about 1,000,000 degrees Fahrenheit?

• 193 angstrom

• 500 angstrom

• 304 angstrom

• 171 angstrom

What is the term for the sun's equator rotating faster than its poles?

• Solar cycle

• Differential rotation

• Magnetic rotation

• Equatorial rotation

What happens to sunspots during the solar activity cycle?

• They move from the equator to the poles

• They move from the poles to the equator

• They disappear completely

• They remain stationary

Which wavelength reveals the chromosphere during a total solar eclipse?

• 500 angstrom

• 304 angstrom

• 193 angstrom

• 171 angstrom

What is released when magnetic fields open out into space?

• Lunar transit

• Sunspots

• Solar wind

• Solar flares

What rare event occurs when Venus moves in front of the sun?

• Solar eclipse

• Lunar eclipse

• Venus transit

• Solar flare