This “selfie” was created using a specialized pupil imaging lens inside of the NIRCam instrument that was designed to take images of the primary mirror segments instead of images of space. (NASA)
By Denise Chow
A million miles from Earth, the James Webb Telescope has snapped its first selfie from orbit.
NASA released the self-portrait Friday, along with several mosaic images that the telescope captured while gazing at its first star. The images were taken as part of a monthslong process to assess the health of the observatory’s various mirrors and instruments.
Nearly 50 days after Webb launched into space, the photos are early indicators that it is functioning as expected and is ready to begin its mission.
“This amazing telescope has not only spread its wings, but it has now opened its eyes,” Lee Feinberg, Webb’s optical telescope element manager at the NASA Goddard Space Flight Center in Greenbelt, Maryland, said Friday in a news briefing.
But before Webb can begin capturing jaw-dropping images of galaxies, star clusters and planets, mission controllers need to be sure that the observatory’s huge primary mirror is properly aligned.
Measuring more than 21 feet across, its honeycomb-shaped primary mirror is designed to collect and focus light from objects in the cosmos. To fit inside its rocket for launch, however, the telescope’s mirror, along with several other components, were carefully folded up.
Over the course of several weeks, as the telescope journeyed to its final destination in orbit around the sun, it delicately unfurled. Each of the telescope’s 18 gold-coated, hexagonal mirror segments were moved into place.
Continue reading… “A million miles away, NASA’s James Webb Telescope snaps its first space selfie”