2/ Why is Cassiopeia A significant in the study of stellar death?
When you make a selection it cannot be changed
youngest known remnant
oldest known remnant
its striking colours
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ESA Webb Telescope
@ESA_Webb
Official feed for James #Webb Space Telescope – an international partnership between NASA, ESA and CSA #WebbSeesFarther #BFFinSpace with
ESA Webb Telescope’s Tweets
🛎️ It's quiz time! This Webb mid-infrared image brought us a stunning example of a stellar aftermath. It shows the supernova remnant Cassiopeia A (Cas A) in our galaxy.
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The science team presented two possible explanations for the lack of carbon dioxide. Read more at the link above. 6/6
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📷 , , , M. Kelley (University of Maryland), H. Hsieh (Planetary Science Institute), A. Pagan (STScI)
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☀ The missing carbon dioxide was a bigger surprise. Typically carbon dioxide makes up about 10 percent of the volatile material in a comet that can be easily vaporised by the Sun’s heat. 5/6
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💫 Main belt comets themselves are a fairly new classification, and Comet Read was one of the original three comets used to establish the category. 4/6
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☄ Comet Read is a main belt comet – an object that resides in the main asteroid belt but which periodically displays a halo, or coma, and tail like a comet. 3/6
Artist's illustration by NASA, ESA.
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With Webb’s observations of #CometRead, astronomers could now demonstrate that water ice from the early solar system can be preserved in the asteroid belt. 2/6
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❄️ Scientists have long speculated that water ice could be preserved in the warmer asteroid belt, inside the orbit of #Jupiter, but definitive proof was elusive – until Webb. 1/6
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🆕 Using Webb’s #NIRSpec astronomers have confirmed water vapour around a comet in the main asteroid belt for the first time. ☄♨️
Read here: esawebb.org/news/weic2313/ or 🧵👇
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Using Webb's #MIRI instrument, astronomers spot #benzene in planet-forming disk around a young star for the first time.
Read more here: astronomie.nl/nieuws/en/astr
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3/ The correct answer is a) roughly 230°C. The result indicates that the planet has no significant atmosphere. Read more: esawebb.org/news/weic2309/
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2/ What is the approximate temperature of TRAPPIST-1 b's dayside?
- roughly 230°C43.6%
- roughly 500°C32.8%
- roughly 750°C23.6%
738 votesFinal results
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🛎️ It's quiz time! Webb measured the temperature of the rocky exoplanet TRAPPIST-1 b. The measurement is based on the planet’s thermal emission: heat energy given off in the form of infrared light.
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⭕☄ The dusty belts are the debris from collisions of larger bodies, analogous to asteroids and comets, and are frequently described as ‘debris discs’. 3/3
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📷 , , , A. Pagan (STScI), A. Gáspár (University of Arizona)
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💫 The belts encircle the young hot star, which can be seen with the naked eye as the brightest star in the southern constellation Piscis Austrinus. 2/3
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👀 Surprisingly, astronomers found the dusty structures to be more complex than our asteroid & Kuiper dust belts.
Overall, there are 3 nested belts extending out to 23 billion km from the star.
The inner belts were revealed by Webb for the first time. 1/3
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🆕 Astronomers used Webb to image the warm dust around nearby young star #Fomalhaut 💫 to study the first #asteroid belt ever seen outside of our Solar System in infrared light. Read here: 🔗 esawebb.org/news/weic2312/ or 🧵👇
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Every month, we feature an amazing image as part of the ESA/Webb Picture of the Month series such as the entwined galaxies IC 1623, here below. You can find all images at esawebb.org/images/potm/
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❓ Can Webb take pictures of Sun?
🅰️ Webb can't look at the Sun because it needs to stay cool to observe the Universe in the infrared. In fact, it's protected by a sunshield. It can observe planets in the outer Solar System, looking away from the Sun. Like Neptune here.
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In the 2023 ESA Hubble and Webb calendar, the month of May features two Webb views of the planetary nebula NGC 3132, also known as the Southern Ring.
Ready to print .pdf here: ow.ly/yVG850O0oRX
📷 &
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Webb's upcoming #MIRI programme will observe the planet's day side, which may provide further insights into the system. 4/4
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However, the team cautions that the water vapour could be on the star itself – specifically, cool starspots – and not from the planet at all. The planet’s host star is cool enough that water vapour can exist in its photosphere. 3/4
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#GJ486b is about 30% larger than Earth, which means it is a rocky world. If the water vapour is associated with the planet, that would indicate that it has an atmosphere despite its temperature and close proximity to its star. 2/4
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🆕 Webb finds water vapour, but is it coming from a rocky planet or its star? 🌞♨️🌑
Water vapour has been seen on gaseous exoplanets before, but to date no atmosphere has been detected around a rocky exoplanet.
Read more here esawebb.org/images/GJ486b/ and 🧵 👇
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#BFFinSpace
☁️✨☁️ Webb can peer through the dusty envelopes around newly born stars to directly investigate the stages of starbirth
✨ Complementing Webb is , which is creating a precise 3D map of over a billion stars in our Milky Way 👉 esa.int/gaia
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3. The correct answer is a) 30 times. The star WR 124 is 30 times the mass of the Sun and has shed 10 Suns-worth of material — so far. Read more: 🔗 esawebb.org/news/weic2307/ 📷 , Webb ERO Production Team
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2/ How much more massive is WR 124 than our Sun?
- 30 times30%
- twice5.5%
- 243 times64.5%
639 votesFinal results
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1/ 🛎️ It's quiz time! As one of its first observations in 2022, Webb captured the Wolf-Rayet star WR 124 in unprecedented detail.
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Before Webb, astronomers did not have the means to do this type of science. 3/3
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📷 , , , T. Morishita (IPAC), A. Pagan (STScI)
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Astronomers used Webb's #NIRSpec instrument to precisely measure the distances and determine that the galaxies are the earliest ones yet to be spectroscopically confirmed as part of a developing cluster. 2/3
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The galaxies confirmed by Webb were first identified as candidates for observation using data from . Webb picked up the investigation, focusing on the galaxies scouted by Hubble and gathering detailed spectroscopic data in addition to imagery. 1/3
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🆕 Seven galaxies highlighted in this image from Webb have been confirmed to be at a distance that astronomers refer to as redshift 7.9, which correlates to 650 million years after the #BigBang.
Read more here esawebb.org/images/protocl or 🧵👇
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🚨 Last days to apply for the Archival Research Visitor Programme! Deadline 30 April
🔴 What: research projects based on public data available
🔴 Where: ESAC (Spain), ESTEC (Netherlands)
🔴 For how long: 1-3 months
Read more 👉 cosmos.esa.int/web/esdc/visit
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It's the #Hubble33 anniversary & we're celebrating with an ethereal photo of a nearby star-forming region.
To date, Hubble has taken approximately 1.6 million observations of nearly 52 000 celestial targets.
Full story: 🔗 esahubble.org/news/heic2304/ and 👇
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