Exploring the Sun with Parker Solar Probe

What makes the concept of 'touching' the sun different from landing on Mars?

• The sun has a solid surface.

• The sun's atmosphere is held by magnetic forces.

• Mars has a stronger gravitational pull.

• Mars is closer to Earth.

What is the significance of the Alfven critical surface?

• It is the hottest part of the sun.

• It marks the start of the sun's core.

• It is where the sun's atmosphere ends.

• It is the source of solar flares.

What did the Parker Solar Probe discover about the shape of the Alfven critical surface?

• It is a perfect sphere.

• It is flat.

• It has spikes and valleys.

• It is shaped like a cube.

What are switchbacks in the context of solar wind?

• Sudden changes in temperature.

• S-shaped kinks in the magnetic field.

• Changes in the sun's gravitational pull.

• Variations in solar radiation.

How did the understanding of switchbacks change after Parker's observations?

• They were found to be rare.

• They occur only at the sun's poles.

• They are common near the sun's surface.

• They are unrelated to solar wind.