Webb Space Telescope Facts

• Cost (at time of launch): $10 billion.

• Orbit: JWST will orbit the sun, around the second Lagrange point (L2), nearly 1 million miles (1.5 million kilometers) from Earth. 

• Primary mirror size: 21.3 feet (6.5 meters) across.

• Launch date: Dec. 25, 2021

• Sunshield: 69.5 ft by 46.5 ft (22 meters x 12 meters).

• Mass: 14,300 lbs (6,500 kg).