Hubble Space Telescope
Mass of mirror 825 kg (1825 lbs)
Designed to be serviced by astronauts
Lenght of mission: more than 25 years
The primary mirror is a single glass mirror, 2.4 m ( 94.5 inches) in diameter
Placed in orbit around Earth by astronauts aboard the space shuttle Discovery
Orbits Earth roughly every 95 minutes at a height of about 547 km (340 miles)
James Webb Space Telescope
Mass of mirror 276 kg (608 lbs)
Located to far from Earth to be serviced by astronauts
Length of mission: 5 to 10 years (limited by fuel)
Primary mirror has 18 segments made of beryllium and is about 6.5 m (21.3 ft) in diameter
Will be launched on an Ariane 5 rocket and will take a month to rach th e L2 orbital point
Positioned about 1.5 million km (1 million miles) from Earth at the L2 point
Both are located in space above Earth's atmosphere.
Both use a mirror to collect and focus light
Both use solar panels to collect sunlight as the source of power
Comparing James Webb and the Hubble space telescopes
(author: Sophia Pomponio 7/8)
