![]() Stunning drone footage shows three killer whales hunt 9-foot great white shark and eat its liver - and.Fossil fishing at the farm! Stunningly well-preserved remains of marine animals that lived in a tropical sea.Manchester City to test high-tech SCARVES that monitor fans' heart rates, body temperature and emotional.Hoping to squeeze in a date after work? Tinder revamps its 'Desk Mode' feature that lets you quickly bring.The great Instagram U-turn! Social media giant kills changes and will phase out full-screen videos and.The smart glasses that let deaf people 'SEE' conversations: £400 XRAI augmented reality sunglasses turn.Out-of-control Chinese rocket booster will hurtle back to Earth on Saturday and could hit land in inhabited.Apocalypse influencers! AI is asked to 'think' what last SELFIE ever taken on earth would look like and. ![]() Just how clogged is your Instagram? MailOnline test reveals that at least 27% of the average feed is filled.New boost of hope for humans on Mars: Congress passes first authorization bill in FIVE YEARS that includes.James Webb detects its first supernova! NASA's $10 billion scope captures a more than 3-million-year-old.The devastating impact of Covid-19 litter on Earth's wildlife: Shocking photos snapped in 23 countries show.Researchers will soon begin to learn more about the galaxies' masses, ages, histories and compositions, as Webb seeks to explore the earliest galaxies in the universe.Ī report was published on the academic preprint server. Its first images of nebulae, an exoplanet and galaxy clusters triggered huge celebration in the scientific world, on what was hailed a 'great day for humanity'. Webb's infrared capabilities mean it can 'see back in time' to within a mere 100-200 million years of the Big Bang, allowing it to snap pictures of the very first stars to shine in the universe more than 13.5 billion years ago. It put an end to months of waiting and feverish anticipation as people across the globe were treated to the first batch of a treasure trove of images that will culminate in the earliest ever look at the dawn of the universe. Last week Webb's dazzling, unprecedented images of a 'stellar nursery', dying star cloaked by dust and a 'cosmic dance' between a group of galaxies were revealed to the world for the first time. The Webb team are now looking at what can be done to mitigate future micrometeorite strikes, including potentially limiting how long the telescope is pointed in directions known to expose the mirror to a higher probability of these impacts. an unlucky early strike by a high kinetic energy micrometeoroid that statistically might occur only once in several years),' the report read, 'or whether the telescope may be more susceptible to damage by micrometeoroids than pre-launch modelling predicted.' 'It is not yet clear whether the May 2022 hit to segment C3 was a rare event (i.e. Spectacular: Pictured is the first image from the James Webb Space Telescope, showing SMACS 0723, a galaxy cluster billions of light-years from Earth Micrometeoroid strikes are a problem for Webb because its 21ft (6.5m) diameter mirror is exposed to space, unlike its predecessor Hubble.īut due to its orbit 1 million miles (1.5 million km) from Earth, at a point called the second Lagrange point or L2, experts only expected Webb to encounter potentially hazardous micrometeorites about once per month. 'However, the effect was small at the full telescope level because only a small portion of the telescope area was affected.' The report added: 'The micrometeoroid which hit segment C3 in the period 22- UT caused significant uncorrectable change in the overall figure of that segment. This damage to the C3 segment could still be compensated for, however, and did not compromise the resolution of Webb's primary mirror as a whole. However, the sixth one raised the wavefront error of the segment from 56 nanometers to 178 nanometers after correction by adjusting the segment. Most of the distortion added by these impacts can be corrected out of the mirror because the 18 hexagonal segments that make it up can be individually and finely adjusted. The commissioning period was a painstaking process which began shortly after Webb reached space and lasted until just a few weeks ago, when ground controllers successfully completed the calibration, alignment, and testing of the telescope's mirrors and instruments.ĭuring that time, five micrometeoroid strikes caused little damage equating to less than 1 nanometer of wavefront error root mean square (RMS), which is a technical way to describe how much Webb's mirror distorts the starlight the mirror collects. 'The single micrometeorite impact that occurred between 22 - UT exceeded prelaunch expectations of damage for a single micrometeoroid triggering further investigation and modelling by the JWST Project,' the report read.
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