Solar Phenomena and Events

Alex Young, a heliophysicist at NASA, discusses a video from the Solar Dynamics Observatory showing the sun over three years. He explains phenomena like lunar transits, sunspots, solar flares, and the sun's rotation. The video also covers the solar activity cycle and how the sun is observed in different wavelengths, revealing features like the solar wind and chromosphere. A rare Venus transit is also highlighted.

What is the term used when the moon moves between the sun and the SDO spacecraft?

• Sunspot

• Lunar transit

• Solar eclipse

• Solar flare

What are the bright patches associated with on the sun's surface?

• Solar winds

• Lunar transits

• Solar flares

• Sunspots

How long does it take for the sun to rotate around its axis at the equator?

• 20 days

• 15 days

• 25 days

• 30 days

What is the phenomenon called when the sun's equator rotates faster than its poles?

• Lunar transit

• Differential rotation

• Solar cycle

• Solar wind

What happens to active regions during the solar activity cycle?

• They move towards the poles

• They move towards the equator

• They disappear

• They remain stationary

What is released when magnetic fields open out into space?

• Solar wind

• Lunar transits

• Sunspots

• Solar flares

Which wavelength shows the chromosphere of the sun?

• Visible light

• 304 angstrom

• 193 angstrom

• 171 angstrom

What can be seen during a total solar eclipse?

• The lunar surface

• The sun's core

• The chromosphere

• The solar wind

What is the rare astronomical event involving Venus called?

• Solar flare

• Venus transit

• Lunar transit

• Solar eclipse

How often does Venus transit in front of the sun?

• Every 150 years

• Every 100 years

• Every 200 years

• Every 50 years