![]() ![]() The HST also developed problems with its gyroscopes and with its solar-power arrays. The resulting optical defect, spherical aberration, caused the mirror to produce fuzzy rather than sharp images. A high-resolution spectrograph receives distant objects’ ultraviolet light that cannot reach Earth because of atmospheric absorption.Ībout one month after launch, it became apparent that the HST’s large primary mirror had been ground to the wrong shape owing to faulty testing procedures by the mirror’s manufacturer. A faint-object camera can detect an object 50 times fainter than anything observable by any ground-based telescope a faint-object spectrograph gathers data on the object’s chemical composition. This camera is designed to achieve image resolutions 10 times greater than that of even the largest Earth-based telescope. The most important of these instruments, the wide-field planetary camera, can take either wide-field or high-resolution images of the planets and of galactic and extragalactic objects. The HST has a 2.4-metre (94-inch) primary mirror, a smaller secondary mirror, and various recording instruments that can detect visible, ultraviolet, and infrared light. The HST is a large reflecting telescope whose mirror optics gather light from celestial objects and direct it into two cameras and two spectrographs (which separate radiation into a spectrum and record the spectrum). ![]() SpaceNext50 Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space!.Learn about the major environmental problems facing our planet and what can be done about them! Saving Earth Britannica Presents Earth’s To-Do List for the 21st Century.Britannica Beyond We’ve created a new place where questions are at the center of learning.100 Women Britannica celebrates the centennial of the Nineteenth Amendment, highlighting suffragists and history-making politicians.COVID-19 Portal While this global health crisis continues to evolve, it can be useful to look to past pandemics to better understand how to respond today.Student Portal Britannica is the ultimate student resource for key school subjects like history, government, literature, and more.Demystified Videos In Demystified, Britannica has all the answers to your burning questions. ![]()
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