Showing posts with label MIRI. Show all posts
Showing posts with label MIRI. Show all posts

Tuesday, August 27

NASA Launces Time Machine


The James Webb Space Telescope, also commonly called Webb, is the most significant advancement in human endeavor toward unraveling the mystery of the cosmos. This infrared observatory started in space with the support of NASA, ESA, and CSA; it can give a new perception of the evolution of the cosmos in the tendency to provide a glimpse of the Big Bang and its effect.

Webb is more than just a telescope – it is humanity’s most potent eye in the sky – providing the ability to observe the universe billions of years back and, hopefully, unlock the key to the cosmos’ evolution and provide answers to some of the most fundamental questions asked by humanity.

A mirror like no other: how Webb’s unprecedented design changes our understanding of the cosmos
Webb’s instrument, called the Mid-Infrared Instrument or MIRI, is designed to collect energy even from behind dust clouds and reveal the objects behind them. It has a mirror that is almost three times the size of the first space telescope, the Hubble, and is made of 18 hexagonal segments, collecting much more light than the earlier telescope, hence capturing the faint lights from the young universe.               READ MORE...

Sunday, September 25

MIRI Anomoly

James Webb Space Telescope MIRI Spectroscopy Animation: The beam of light coming from the telescope is then shown in deep blue entering the instrument through the pick-off mirror located at the top of the instrument and acting like a periscope.Then, a series of mirrors redirect the light toward the bottom of the instruments where a set of 4 spectroscopic modules are located. Once there, the beam of light is divided by optical elements called dichroics in 4 beams corresponding to different parts of the mid-infrared region. Each beam enters its own integral field unit; these components split and reformat the light from the whole field of view, ready to be dispersed into spectra. This requires the light to be folded, bounced, and split many times, making this probably one of Webb’s most complex light paths.  To finish this amazing voyage, the light of each beam is dispersed by gratings, creating spectra that then projects on 2 MIRI detectors (2 beams per detector). An amazing feat of engineering! Credit: ESA/ATG medialab



Mid-Infrared Instrument Operations Update
The James Webb Space Telescope’s Mid-Infrared Instrument (MIRI) has four observing modes

During setup for a science observation on August 24, a mechanism that supports one of these modes, known as medium-resolution spectroscopy (MRS), exhibited what appears to be increased friction. 

This mechanism is a grating wheel that allows astronomers to select between short, medium, and longer wavelengths when making observations using the MRS mode. 

Following preliminary health checks and investigations into the issue, an anomaly review board was convened on September 6 to assess the best path forward.  READ MORE...

Saturday, September 10

Photos of an Alien World

The HIP 65426 b gas giant planet photographed by the James Webb Space Telescope on the 
background of the Digitized Sky Survey (Image credit: NASA/ESA/CSA, A Carter (UCSC), 
the ERS 1386 team, and A. Pagan (STScI))



The James Webb Space Telescope took its first direct image of a planet orbiting a distant star, proving its potential to revolutionize exoplanet research.


The absolute majority of exoplanets have only been observed through temporary dips in brightness of the stars they orbit; only about two dozen have been imaged directly. But that might soon change. Less than two months after it started its science operations, the James Webb Space Telescope has delivered its first direct photo of a planet beyond our solar system.


The planet, a gas giant orbiting the star called HIP 65426 some 385 light-years from Earth, appears in the image as a tiny splotch close to the glowing star. Webb photographed the exoplanet using its Near-Infrared Camera (NIRCam) and the Mid-Infrared Instrument (MIRI), each of which focuses on a different flavor of infrared light.


"This is a transformative moment, not only for Webb but also for astronomy generally," Sasha Hinkley, an astronomer at the University of Exeter in the U.K. who led these observations, said in a statement(opens in new tab).


Scientists had discovered the planet in 2017 with the Very Large Telescope in Chile; Webb isn't tailored to discovering new exoplanets and will instead excel at teaching scientists about worlds other observatories identified.


Exoplanets are extremely difficult to observe directly because they are so much fainter than the stars they orbit. This one, HIP 65426 b, could only be spotted thanks to a combination of factors. First, it's extremely far away from its parent star, 100 times the distance from the sun to Earth (for comparison, Pluto orbits only 40 sun-Earth distances from the sun). Second, HIP 65426 b is also extremely massive — 12 times the size of Jupiter, the solar system's largest planet.  READ MORE...

Thursday, July 28

Phantom Galarxy Looks Like A Wormhole

The James Webb Space Telescope's imagery of NGC 628 (the "Phantom Galaxy") shows glowing 
dust in this citizen science image. (Image credit: NASA/ESA/CSA/Judy Schmidt)




A fresh image based on brand-new deep-space data appears to show a wormhole spinning before our very eyes.

The appropriately named "Phantom Galaxy" glows eerily in a new image by Judy Schmidt based on James Webb Space Telescope data collected nearly a million miles away from our planet using the observatory's mid-infrared instrument (MIRI).

"I've been doing this for 10 years now, and [Webb] data is new, different, and exciting," Schmidt told Space.com. "Of course I'm going to make something with it."

The image highlights the dust lanes in the galaxy, which is more properly known as NGC 628 or Messier 74. Dubbed the "perfect spiral" by some astronomers because the galaxy is so symmetrical, the Phantom Galaxy is scientifically interesting because of the intermediate-mass black hole scientists believe is embedded at its heart.

The galaxy has been imaged professionally many times before, including by space observatories such as the Hubble Space Telescope and the Wide-field Infrared Survey Explorer (WISE). 

What makes Webb imagery stand apart from these past efforts is the mid-infrared range that highlights cosmic dust, along with the power of its unique 18-segment hexagonal mirror and deep-space location.

Webb observed M74 earlier this week. The data was also shared on Twitter(opens in new tab) (with different filtration) by Gabriel Brammer, an astronomer at the Cosmic Dawn Center in the Niels Bohr Institute at the University of Denmark.  READ MORE...