#Coronagraph

Daniel Fischercosmos4u@scicomm.xyz
2025-08-07

Had the opportunity to visit a most fascinating solar #observatory Thursday in #Switzerland near #Arosa, the Astrophysikalisches Observatorium #Tschuggen (AOT) which #MaxWaldmeier had built in 1939, which was abandoned in 1980 and which amateur astronomers are now bringing back to the state just at that time: Here are the original Kern #coronagraph and another one from #Zeiss (with a huge spectrograph) it's sitting on. See facebook.com/media/set/?vanity for a picture album, with links to the background in the first comment.

The telescope stack from one side.The stack from the other side.
2025-07-08

NASA's Habitable Worlds Observatory Will Search For Life

#Astrophysics #CarbonDioxide #Coronagraph #Eic(earthinformationcenter)display #Exoplanet #HabitableWorldsObservatory #Spectroscopy

⏩ 2 new pictures and 2 new videos from NASA (SVS) commons.wikimedia.org/wiki/Spe

NASA's_Habitable_Worlds_Observatory_Will_Search_For_Life_(SVS14861).jpgDYAMOND_Global_Carbon_Dioxide_for_Science_On_A_Sphere_(SVS5436_-_dyamondPointCloud_1-29-2025a_dyamond_co2_sos_surface_8k_00001_print).jpgDYAMOND_Global_Carbon_Dioxide_for_Science_On_A_Sphere_(SVS5436_-_dyamondPointCloud_10-8-2024a_dyamond_co2_sos_volume_8k_00001_print).jpg
2025-06-17

Two European satellites mimic a total solar eclipse as scientists aim to study its corona.

The satellites have created the first artificial solar eclipse by flying in precise formation, providing hours of on-demand totality for scientists.

Dubbed Proba-3, the €181 million mission has generated 10 successful solar eclipses so far.

ESA released the eclipse pictures at the Paris Air Show on Monday.

mediafaro.org/article/20250616

#ESA #Space #Science #Sun #SolarEclipse #Proba3 #Coronagraph

Daniel Fischercosmos4u@scicomm.xyz
2025-04-19

Experimental demonstration of a quantum-optimal coronagraph using spatial mode sorters: opg.optica.org/optica/fulltext -> Turning down starlight to spot new exoplanets: optica.org/about/newsroom/news - new #coronagraph could reveal hidden planets beyond our solar system.

2025-03-25

We'll be presenting this Coronagraphy JWebbinar with Aarynn Carter and Jonathan Aguilar, register here before March 30 if you're interested.

#JWST #Coronagraph
stsci.edu/jwst/science-executi
under 2025, it's number 40 @jwstobserver

Daniel Fischercosmos4u@scicomm.xyz
2025-02-07

Yay, 'live' images from the new solar #coronagraph CCOR-1 are finally available on testbed.spaceweather.gov/produ though it is still not operational! Can we have another bright small-elongation comet now, please? ;-)

The current image as displayed on the testbed website.
2024-07-24

#JWST #Coronagraph discovered and photographed a NEW, MATURE #exoplanet , about 6x the mass of Jupiter and ~5-10º C in famous, nearby Epsilon Indi system, 12 light-years away!

MIRI is so sensitive, almost unfair 😱, the planet was visible in the VLT/NEAR data but unclaimed in Pathak et al. 2021

PR: esawebb.org/news/weic2421/

Paper: nature.com/articles/s41586-024

Congrats Lis Matthews & team!
Thread by the first author x.com/djulik/status/1816137356

Bibiana Prinoth (moved!)bibianaprinoth@astrodon.social
2024-03-18

Next up, we’ve got Jason Wang about the #Roman #coronagraph.

Fun fact: Nancy Grace Roman envisioned imaging reflect light planets and wrote a paper about it. Jason points out how fitting it is that this will be done with Roman.

The Roman coronagraph will provide a large increase in sensitivity and demonstrate some key technologies: dark hole digging, large deformable mirrors, …#ExSSV

2022-12-21

Absolutely awesome to see the Roman #Coronagraph Instrument getting integrated and tested @NASAJPL. Demonstrating technologies like wavefront control in space, it will allow us to image directly exoplanets like ~Jupiter in reflected light, starting in ~2027. Look at those optics!
---
RT @NASARoman
Stars you see may have planets around them, but the starlight is so bright we can't see them even with powerful telescopes. Roman's Coronagrap…
twitter.com/NASARoman/status/1

Engineers at L3Harris Technologies, a contractor for the Roman Coronagraph Instrument, are shown inspecting the instrument’s optical path, which feeds light from the telescope into the instrument. Two people on the left of the image are wearing white full-body suits and are bent down, looking up at the instrument components. The hardware in front of them are made up of metal boxes and electrical wires, set on pedestals that lift them up above the engineers’ heads. The topmost instrument has textured red sides and blue and pink wires. All of the components are inside a silver framework with a black panel on top.Wide slightly overhead shot of the Nancy Grace Roman Space Telescope’s Coronagraph Instrument. There is a trapezoid-shaped box with wires along the top of it. There are round filters, which look like circular colored windows, mounted vertically at various spots on top of the box.Close-up shot of the fast steering mirror, part of the optical bench in the Coronagraph Instrument on NASA’s Nancy Grace Roman Space Telescope. In the top left corner of the image, a person wearing a white coverall suit, hood, gloves, and blue mask  is bent over, looking into the small mirror in front of them. The mirror is shaped like a blue reflective circle, mounted in a triangular metal frame held by a slightly larger, trapezoid-shaped frame. The outermost frame has orange cables weaving through it.Close-up shot of a series of color filters on the Color Filter Assembly for the Coronagraph Instrument on NASA’s Nancy Grace Roman Space Telescope. Many of the filters appear dark in this photo because they block all visible light – the range of wavelengths that are visible to the human eye – but are transparent to infrared light, which encompasses a range of wavelengths slightly longer than visible light.

There are four rows of five circles at staggered positions. The first row of colors goes from dark grey to pink. The second row goes from black to orange and then different shades of green. The last two rows are different shades of grey. All of the circles are mounted in a rectangular metal frame. Behind the frame, the image’s background is out of focus, with areas of light and shadow.
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