Official @ESA feed for James #Webb Space Telescope – an international partnership between NASA, ESA and CSA #WebbSeesFarther #BFFinSpace with @Hubble_Space
1 added to My Authors
Apr 23 • 5 tweets • 4 min read
#BFFinSpace As @HUBBLE_space celebrates its 32nd year of operations, here are some captivating facts about the observatory’s achievements and impact 👇
📷 @esa@HUBBLE_space@esa 🔴 Launched on 24 April 1990, the NASA/ESA Hubble Space Telescope has made more than 1.5 million observations of about 50 000 celestial objects 👇
Apr 22 • 4 tweets • 3 min read
On 24 April @HUBBLE_space celebrates its 32nd year of operations 🍾 and as #BFFinSpace, we want to celebrate together 🎂 with this anniversary image of a galaxy grouping 👇
📷 NASA, ESA, and STScI
Music: Mylonite – Breath of my Soul
@HUBBLE_space This pan presents an unusual close-knit collection of five galaxies 🌀 called the Hickson Compact Group 40. Three spiral-shaped galaxies, an elliptical galaxy and a lenticular (lens-like) galaxy somehow have crossed paths ...👇
Feb 11 • 12 tweets • 5 min read
1/ 📢 This is an image mosaic of 18 randomly organised dots of starlight, the product of #Webb 's unaligned mirror segments all reflecting light from the same star back at Webb's secondary mirror and into #NIRCam's detectors. Thread 👇 with a surprise at the end! 2/ The mosaic was created by pointing the telescope at a bright, isolated star in the constellation Ursa Major known as HD 84406, chosen specifically because it's easily identifiable and not crowded by other stars of similar brightness, which helps to reduce background confusion
Feb 2 • 7 tweets • 3 min read
Taking #Webb's temperature 🌡️ 5 new temperature monitoring points have been added to the NASA website to track cooling and status of the instruments during the post L2 arrival commissioning process. Let's have a look at them 👇
1/ Temperature control is a vital aspect of #Webb 's design, engineering and operations. On the page you can see 2 "hot side" and 2 "cold side" temperatures and a set of bellweather instrument temperatures
Jan 31 • 4 tweets • 2 min read
Some of you asked recently why are #Webb's mirrors hexagonal? Thread 👇
📷 NASA/Chris Gunn 1/ The hexagonal shape enables a roughly circular, segmented mirror with "high filling factor and six-fold symmetry." High filling factor just means the segments fit together without gaps, which would not be the case if the segments were circular
Jan 30 • 8 tweets • 3 min read
As #Webb is going through the focusing of its mirrors, let's look into what this process entails. #WebbSeesFarther 👇
1/ #Webb's 18 hexagonal mirrors have already been unfolded a while back, but now it's time for a more precise alignment so they point in exactly the same direction 🎯 and deliver sharp images.
📷 NASA/Chris Gunn
Jan 24 • 16 tweets • 7 min read
1/ While we wait for news on L2 orbit insertion, we've got some facts for you on #Webb's orbit 👇
2/ Unlike @Hubble_Space#Webb will not be in orbit around the Earth, but will orbit the Sun, 1.5 million km away from the 🌍 at what is called the second Lagrange point or L2.
Jan 24 • 21 tweets • 10 min read
As we approach final destination, let's take a moment to recap all the incredible steps #Webb went through so far. Thread 👇
1/ Webb's journey to space started in French Guiana, at the European Space Port. Here's why this was an ideal launch side for #Webb
1/ The Mid-InfraRed Instrument #MIRI is one of 4 instruments on the James #Webb Space Telescope. The only mid-infrared instrument in its instrument suite. #WebbSeesFarther
📷 NASA/ Chris Gunn 2/ Thanks to state-of-the-art instrument design and components, it will deliver mid-infrared images and spectra with an unprecedented combination of sharpness and sensitivity. #WebbSeesFarther
Jan 22 • 4 tweets • 2 min read
1/ #NIRSpec has three modes of operation: multi-object spectroscopy mode, fixed slits spectroscopy mode and integral field spectroscopy mode:
2/ 🔴 multi-object spectroscopy mode — #NIRSpec will be the 1st multi-object spectrograph in space, able to record the spectra of up to 200 objects at the same time. A capability enabled by microshutters.
Jan 8 • 16 tweets • 6 min read
1/ As we wait for full mirror deployment, here are some cool-to-know facts about #Webb 's mirrors.
📷 Northrop Grumman, NASA/Chris Gunn 2/ #Webb has a primary mirror 6.5m across as this is what was needed to measure the light from very young galaxies 🌀 over 13 billion light years away.
Jan 5 • 5 tweets • 3 min read
1/ While everyone's eyes were on the shield tensioning, the Mid-Infrared Instrument (MIRI) provided by @esa for #Webb also had an important milestone: unlocking the Contamination Control Cover, which had to be locked for launch.
🎥 ESA/ATG medialab
@esa 2/ After successfully completing the tests and unlocking the cover, the instrument control electronics were then powered off before the next steps on the sunshield tensioning activities.