NASA | The Mystery of the Aurora

Auroras, also known as the Northern Lights, are stunning displays of colored light in the sky, caused by space weather affecting Earth's magnetic field. These phenomena can disrupt power grids and communication systems. Spring is an ideal time to view auroras due to frequent substorms. NASA's Themis mission aims to uncover the mysteries of auroras using satellites and ground observatories, enhancing our understanding of these natural wonders.

What causes the auroras, also known as the Northern Lights, to appear in the sky?

• Volcanic eruptions releasing gases

• Reflection of sunlight on ice crystals

• Energy from space interacting with Earth's magnetic field

• Moonlight reflecting off clouds

What potential problems can auroras cause on Earth?

• Hurricanes

• Increase in ocean tides

• Disruption of power grids and GPS signals

• Earthquakes

During which time of the year are auroras most frequently observed?

• Summer solstice

• Winter solstice

• Around the equinoxes

• During full moons

What is the primary goal of NASA's THEMIS mission?

• To monitor solar flares

• To explore the outer planets

• To track and understand the triggers of auroras

• To study the surface of Mars

How does the THEMIS mission study auroras?

• Through underwater sensors

• With five satellites and ground observatories

• By sending astronauts to the auroras

• Using a single large telescope