How to Clean Up After Ourselves in Space

The video discusses the growing problem of space junk and its potential dangers, such as the Kessler syndrome. It explores current solutions like lasers and trash collection missions, which face challenges. The video introduces solar sails, initially developed for deep space missions, as a potential solution to deorbit space junk faster. Drag sails, a variation of solar sails, are being tested to bring down satellites efficiently. These sails could help slow the growth of space debris, offering a promising approach to managing space junk.

What is the main challenge mentioned in the introduction regarding space junk?

• Launching objects into space

• Bringing objects back from space

• Communicating with satellites

• Building space stations

What is Kessler syndrome?

• A new type of satellite

• A chain reaction of space collisions

• A method to clean space junk

• A space exploration mission

Which of the following is NOT a proposed solution to space junk?

• Firing lasers to change trajectories

• Sending trash collection missions

• Using solar sails

• Building more satellites

What is the primary function of solar sails?

• To provide fuel for spacecraft

• To help spacecraft fly like a glider

• To collect space debris

• To communicate with Earth

How do drag sails help reduce space junk?

• By slowing down and deorbiting spacecraft

• By using lasers to destroy debris

• By collecting debris in space

• By increasing the speed of satellites

What is the thickness of the foil used in drag sails?

• Half the thickness of a human hair

• One-tenth the thickness of a human hair

• Twice the thickness of a human hair

• Equal to a human hair

What is the largest size a drag sail can extend to?

• 150 meters square

• 100 meters square

• 200 meters square

• 50 meters square