Conversation

Notices

1. AkaSci 🛰️ (akasci@fosstodon.org)'s status on Tuesday, 07-Nov-2023 13:41:32 UTC AkaSci 🛰️

   in reply to

   This is another raw test image, taken by Euclid’s Near-Infrared Spectrometer and Photometer (NISP) instrument.

   NISP has an imager and a spectrometer, which allows it to accurately estimate distances to celestial objects.

   https://www.esa.int/Science_Exploration/Space_Science/Euclid/Euclid_test_images_tease_of_riches_to_come
   #ESAEuclid #Euclid
   3/n

   • AkaSci 🛰️ (akasci@fosstodon.org)'s status on Tuesday, 07-Nov-2023 13:41:32 UTC AkaSci 🛰️

     in reply to

     Launched on July 1, the Euclid space telescope is operating in a Lissajous/halo orbit around the Sun-Earth L2 Lagrange point.

     Other space telescopes in orbit around L2 include Gaia and JWST.

     Unlike a Halo orbit, a Lissajous orbit precesses after each revolution. Both orbits are unstable and require periodic (~monthly) thruster firings for station-keeping.

     https://www.researchgate.net/publication/361812339_The_Euclid_Wide_Survey
     #ESAEuclid #Euclid
     4/n

   • AkaSci 🛰️ (akasci@fosstodon.org)'s status on Tuesday, 07-Nov-2023 13:41:33 UTC AkaSci 🛰️

     We can get a sense of what the Euclid images tomorrow will look like by observing this test image released on July 31. This is a raw engineering image, taken by the VIS instrument, with very little processing; even the traces caused by cosmic rays are visible in this image.

     Note that the original image is 24k x 24k pixels!

     https://www.esa.int/Science_Exploration/Space_Science/Euclid/Euclid_test_images_tease_of_riches_to_come
     #ESAEuclid #Euclid
     2/n