James Webb Space Telescope moves to final orbit

January 29, 2022

On Monday, the entered its destination orbit around the L2, about  from , on the opposite side of Earth from the.

A maneuver closed the spacecraft's month-long journey that began in late December, following years of delays and several cost overruns. For its expected five- to ten-year service life, it is to study the most distant, and therefore the earliest formed after the.

During its journey, dubbed "30 days of terror" by , the telescope successfully unfurled its 21-foot (6.4 meter) wide mirror, deployed its and cooled down to below 50 degrees  as it traveled to the L2 Lagrange point.



L2 is a secure location for spacecraft where the gravitational pull of the Sun and the Earth is balanced. Full scientific operations are slated to begin later this year and will involve 13 teams of scientists. The primary mission is to find the most distant and earliest galaxies formed after the Big Bang to help study the origins of the. The nominal mission time is five years, with a goal of ten. The location of its orbit is very different to its predecessor, the Hubble Space Telescope, which orbits much closer to Earth. James Webb's instruments will face away from the Sun, giving a greater clarity to the images it will obtain compared to Hubble.

An launch vehicle carried the telescope up on December 25 from the  in French Guiana, after arriving in October. The launch date was delayed by a week due to unfavorable weather.

The United States National Aeronautics and Space Administration (NASA) began project development in 1996, planning for a launch in 2007 at a cost of USD550 million. After NASA contracted Northrop Grumman to build the telescope, mission managers estimated a 2010 launch would cost between one and 3.5 billion USD. Redesigns to reduce technical requirements pushed launch plans to 2013 for an estimated cost of USD4.5 billion. The US Congress ordered a project review in 2010 which delayed the launch again to 2015.

For an estimated cost of USD6.5 billion, the proposed canceling the telescope altogether in 2011. After a plan was made for a 2018 launch at a cost of USD8.8 billion, technical errors found in the telescope and the COVID-19 pandemic pushed the launch date to 2021.