Image (Credit): Star cluster NGC 602. (X-ray: NASA/CXC; Infrared: ESA/Webb, NASA & CSA, P. Zeilder, E.Sabbi, A. Nota, M. Zamani; Image Processing: NASA/CXC/SAO/L. Frattare and K. Arcand)
This week’s image from NASA showing a cosmic wreath is appropriate for the holiday season. It comes from NASA’s Chandra X-ray Observatory and the James Webb Space Telescope.
The [image] depicts star cluster NGC 602 in vibrant and festive colors. The cluster includes a giant dust cloud ring, shown in greens, yellows, blues, and oranges. The green hues and feathery edges of the ring cloud create the appearance of a wreath made of evergreen boughs. Hints of red representing X-rays provide shading, highlighting layers within the wreath-like ring cloud.
The image is aglow with specks and dots of colorful, festive light, in blues, golds, whites, oranges, and reds. These lights represent stars within the cluster. Some of the lights gleam with diffraction spikes, while others emit a warm, diffuse glow. Upon closer inspection, many of the glowing specks have spiraling arms, indicating that they are, in fact, distant galaxies.
Image (Credit): Quasar known as RX J1131-1231, which is located roughly 6 billion light-years from Earth in the constellation Crater. (ESA/Webb, NASA & CSA, A. Nierenberg)
This week’s image is from the James Webb Space Telescope. It was highlighted inUSATodayas one of the best images from 2024. It shows the gravitational lensing of RX J1131-1231, which is a quasar about 6 billion light-years from Earth.
Here is more about the image:
It is considered one of the best lensed quasars discovered to date, as the foreground galaxy smears the image of the background quasar into a bright arc and creates four images of the object. Gravitational lensing, first predicted by Einstein, offers a rare opportunity to study regions close to the black hole in distant quasars, by acting as a natural telescope and magnifying the light from these sources. All matter in the Universe warps the space around itself, with larger masses producing a more pronounced effect. Around very massive objects, such as galaxies, light that passes close by follows this warped space, appearing to bend away from its original path by a clearly visible amount. One of the consequential effects of gravitational lensing is that it can magnify distant astronomical objects, letting astronomers study objects that would otherwise be too faint or far away.
Image (Credit): Spiral galaxy NGC 5643, which is located roughly 40 million light-years away in the constellation Lupus. (ESA/Hubble & NASA, A. Riess, D. Thilker, D. De Martin (ESA/Hubble), M. Zamani (ESA/Hubble))
This week’s image comes from the NASA/European Space Agency’s (ESA) Hubble Space Telescope. It shows colorful spiral galaxy NGC 5643, which is located roughly 40 million light-years away in the constellation Lupus.
NGC 5643 is what’s known as a grand design spiral, referring to how the galaxy’s two large, winding spiral arms are clear to see. The spiral arms are defined by bright blue stars, lacy reddish-brown dust clouds and pink star-forming regions. As fascinating as the galaxy appears at visible wavelengths, some of NGC 5643’s most interesting features are invisible to the human eye. Ultraviolet and X-ray images and spectra of NGC 5643 show that the galaxy hosts an active galactic nucleus: an especially bright galactic core powered by a feasting supermassive black hole. When a supermassive black hole ensnares gas from its surroundings, the gas collects in a disc that heats up to hundreds of thousands of degrees. The superheated gas shines brightly across the electromagnetic spectrum, but especially at X-ray wavelengths.
NGC 5643’s active galactic nucleus isn’t the brightest source of X-rays in the galaxy, though. Researchers using ESA’s XMM-Newton discovered an even brighter X-ray-emitting object, called NGC 5643 X-1, on the galaxy’s outskirts. What could be a more powerful source of X-rays than a supermassive black hole? Surprisingly, the answer appears to be a much smaller black hole!
While the exact identity of NGC 5643 X-1 is not yet known, evidence points to a black hole that is about 30 times more massive than the Sun. Locked in an orbital dance with a companion star, the black hole ensnares gas from its stellar companion, creating a superheated disc that outshines the galactic centre.
This week’s image is the best space exploration image winner in The Planetary Society’s Best of 2024 contest. It shows the Odysseus lunar lander, launched on February 15, leaving the Earth behind as it travels to the Moon. You can read more about the lunar mission to the lunar South Pole by visiting this NASA mission page.
Visit The Planetary Society for more on the Best of 2024 winners, including the most exciting upcoming planetary science mission. I won’t spoil the news. You can read about it yourself.
Image (Credit): Expedition 72 astronauts on the ISS celebrating Thanksgiving. (NASA)
This week’s image shows the four US astronauts aboard the International Space Station (ISS) showing their Thanksgiving meal to all of us (contained in the white plastic bags). The astronauts pictured (clockwise from bottom left) are Nick Hague, Suni Williams, Butch Wilmore, and Don Pettit. You also watch a video where they share their holiday messages.
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