Image (Credit): JWST’s view of exoplanet Epsilon Indi Ab. (NASA, ESA, CSA, STScI, E. Matthews (Max Planck Institute for Astronomy))
This week’s image looks dark and simple, and yet it is an amazing sight provided by NASA’s James Webb Space Telescope (JWST). It shows a directly imaged exoplanets that resides about 12 light-years from us. It is called Epsilon Indi Ab and is several times the mass of Jupiter.
Here is an explanation from NASA about what you are seeing in the image:
This image of the gas-giant exoplanet Epsilon Indi Ab was taken with the on NASA’s James Webb Space Telescope’s MIRI (Mid-Infrared Instrument). A star symbol marks the location of the host star Epsilon Indi A, whose light has been blocked by the coronagraph, resulting in the dark circle marked with a dashed white line. Epsilon Indi Ab is one of the coldest exoplanets ever directly imaged. Light at 10.6 microns was assigned the color blue, while light at 15.5 microns was assigned the color orange. MIRI did not resolve the planet, which is a point source.
The arrival of August means two things for stargazers — “shooting stars” and the Milky Way. In 2024, you can see both at the same time if you know exactly where and when to look…This month, there’s a new moon on Aug. 4, which will keep the post-sunset sky dark until about Aug. 8. That makes the first week of August ideal for spotting “shooting stars” — while you also look for the Milky Way. True darkness won’t come until midnight for most of the Northern Hemisphere, but look to the southeast after dark, and you’ll have a chance of seeing the Sagittarius arm of the Milky Way arching across the night sky.
Using the James Webb Space Telescope (JWST), an MPIA-led team of astronomers imaged a new exoplanet that orbits a star in the nearby triple system Epsilon Indi. The planet is a cold super-Jupiter exhibiting a temperature of around 0 degrees Celsius and a wide orbit comparable to that of Neptune around the Sun. This measurement was only possible thanks to JWST’s unprecedented imaging capabilities in the thermal infrared. It exemplifies the potential of finding many more such planets similar to Jupiter in mass, temperature, and orbit. Studying them will improve our knowledge of how gas giants form and evolve in time.
Researchers are turning to techniques from astronomy to help spot computer-generated ‘deepfake’ images — which can look identical to genuine photographs at first glance. By analysing images of faces using methods that are usually used to survey distant galaxies, astronomers can measure how a person’s eyes reflect light, which can reveal telltale signs of image manipulation.
Image (Credit): The Penguin and Egg galaxies, known jointly as Arp 142. (NASA, ESA, CSA, STScI)
This week’s fun image comes from the James Webb Space Telescope. Called the Penguin and the Egg, these two galaxies of similar mass are locked together.
Before their first approach, the Penguin held the shape of a spiral. Today, its galactic center gleams like an eye, its unwound arms now shaping a beak, head, backbone, and fanned-out tail.
Like all spiral galaxies, the Penguin is still very rich in gas and dust. The galaxies’ “dance” gravitationally pulled on the Penguin’s thinner areas of gas and dust, causing them to crash in waves and form stars. Look for those areas in two places: what looks like a fish in its “beak” and the “feathers” in its “tail.”
Surrounding these newer stars is smoke-like material that includes carbon-containing molecules, known as polycyclic aromatic hydrocarbons, which Webb is exceptional at detecting. Dust, seen as fainter, deeper orange arcs also swoops from its beak to tail feathers.
In contrast, the Egg’s compact shape remains largely unchanged. As an elliptical galaxy, it is filled with aging stars, and has a lot less gas and dust that can be pulled away to form new stars. If both were spiral galaxies, each would end the first “twist” with new star formation and twirling curls, known as tidal tails.
Another reason for the Egg’s undisturbed appearance: These galaxies have approximately the same mass or heft, which is why the smaller-looking elliptical wasn’t consumed or distorted by the Penguin.
It is estimated that the Penguin and the Egg are about 100,000 light-years apart — quite close in astronomical terms. For context, the Milky Way galaxy and our nearest neighbor, the Andromeda Galaxy, are about 2.5 million light-years apart. They too will interact, but not for about 4 billion years.
SpaceX successfully launched its first Falcon Heavy of the year on Wednesday evening, the triple-barreled booster lifting the 11,000-pound (5,000-kilogram) Geostationary Operational Environmental Satellite (GOES-U) almost to Geostationary Earth Orbit (GEO) on behalf of the National Oceanic and Atmospheric Administration (NOAA). The Heavy—flying for the first time since November 2022 with a brand-new center core and pair of side-mounted strap-on boosters—went airborne from historic Pad 39A at Florida’s Kennedy Space Center (KSC) at 5:26 p.m. EDT, ten minutes after the opening of a two-hour “launch window”.
The Great Red Spot of Jupiter was observed by Webb’s Near-InfraRed Spectrograph (NIRSpec) in July 2022, using the instrument’s Integral Field Unit capabilities. The team’s Early Release Science observations sought to investigate if this region was in fact dull, and the region above the iconic Great Red Spot was targeted for Webb’s observations. The team was surprised to discover that the upper atmosphere hosts a variety of intricate structures, including dark arcs and bright spots, across the entire field of view. “We thought this region, perhaps naively, would be really boring,” shared team leader Henrik Melin of the University of Leicester in the United Kingdom. “It is in fact just as interesting as the northern lights, if not more so. Jupiter never ceases to surprise.”
Gravitational wave detectors, LIGO and Virgo, have detected a population of massive black holes whose origin is one of the biggest mysteries in modern astronomy. According to one hypothesis, these objects may have formed in the very early Universe and may compose dark matter, a mysterious substance filling the Universe. A team of scientists from the OGLE (Optical Gravitational Lensing Experiment) survey from the Astronomical Observatory of the University of Warsaw have announced the results of nearly 20-year-long observations indicating that such massive black holes may comprise at most a few percent of dark matter. Another explanation, therefore, is needed for gravitational wave sources. The results of the study were published in two articles, in Nature and the Astrophysical Journal Supplement Series.
Image (Credit): A graphic explaining the various instruments on the Chandra X-ray Observatory. (NASA)
Even with a good space week in hand, we still need to keep an eye on NASA’s budget to maintain a robust set of programs to explore the cosmos. A recent Youtube video by Cool Worlds Labs, “NASA’s in Trouble,” highlights those budgetary issues and focuses on what individuals can do as well, such as visiting https://www.savechandra.org/ and asking Congress to restore funds cut from the Chandra X-ray Observatory.
Professor David Kipping makes it clear he is not going to remain silent while these cuts are being considered. He and his team demonstrate their love for astronomy in every video and podcast, making them great ambassadors in this debate for continued NASA funding.
The video is forthright about the internal issues creating budgetary issues. For example, the considerable cost overruns and delays prior to the launch of the now successful James Webb Space Telescope came at a cost to other NASA programs over many years. And similar overruns are expected with future large projects as well, further squeezing other line items in the budget.
The video also highlights some promising developments that could help to lower costs in the future, though the issue on the table now is NASA’s FY 2025 budget.
View the video for yourself to learn more about the proposed budget cuts as well as what you can do to help.
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