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NASA has shared a fascinating photograph featuring three different galaxies. And with that, the space agency has also explained how these galaxies don’t let any “labels define them”. Confused? Let’s unpack. On June 13, NASA posted a photograph of three galaxies — one right in the centre and the other two spotted on the extreme right and bottom of the picture. The photo was captured by the wide-field camera 3 of NASA’s Hubble telescope. Now, let’s understand what makes these galaxies unique. In its Instagram post, the agency said that the galaxy pictured in the middle was “difficult to classify” and the reasons are very interesting.

While it is sometimes classified as a spiral galaxy, similar to our own Milky Way, it is also sometimes classified as a lenticular galaxy,” the agency says. “Lenticular galaxies are a galaxy type that sits between spiral and elliptical varieties.” Now, that makes it more complex, right?

But here’s a simpler way of looking at it. NASA says the galaxies grow just as we do. “While the spiral arms of this galaxy are distinguishable, they’re not clearly defined. Pictured here, the tip of one arm appears to be diffused,” it says.

Galaxies are not static, and their morphologies (and therefore their classifications) vary throughout their lifetimes, says NASA in a separate note published on its website.

“Spiral galaxies are thought to evolve into elliptical. This can happen by merging with one another, causing them to lose their distinctive spiral structure,” NASA says further in its Instagram post, explaining how even the galaxies change their composition with time.

The agency says that the spiral galaxy NGC 4680 in the middle is flanked by two other galaxies as we explained above. Interestingly, NGC 4680 enjoyed a wave of attention in 1997, playing host to a supernova explosion known as SN 1997bp, says NASA.

NASA shared the same picture on Twitter as well and a user wondered if the space agency ever flirted with the idea of sending its astronauts to one of these galaxies.

Another user, though, explained why it was nearly impossible for NASA to undertake any such mission.

Here are some more Twitter reactions to the picture:

The Hubble telescope, which captured the picture, was launched in 1990 as a collaboration project between NASA and the European Space Agency. The telescope has an unobstructed view of the universe.


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Fossils Reveal Evolution of Early Nervous Systems in Ecdysozoans

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Fossils Reveal Evolution of Early Nervous Systems in Ecdysozoans

A discovery has shed light on the early evolution of nervous systems in ecdysozoan animals, a group that includes insects, nematodes, and priapulid worms. Fossil evidence from the early Cambrian Kuanchuanpu Formation has revealed details of the ventral nerve cord structure in ancient organisms, providing key insights into the evolutionary history of this critical component of the central nervous system. This discovery offers a glimpse into the nervous system architecture of one of the earliest known ecdysozoan lineages.

Revelations From Cambrian Fossils

According to a study titled Preservation and early evolution of scalidophoran ventral nerve cord published in Science Advances, scientists analysed fossils from Cambrian deposits, including those of Eopriapulites and Eokinorhynchus. As reported by phs.org, the findings suggest that the ancestors of scalidophorans, a subgroup of ecdysozoans, possessed a single ventral nerve cord. Researchers observed structures along the ventral side of these ancient organisms, resembling the ventral nerve cords of modern priapulid worms.

Dr. Deng Wang from Northwest University and Dr. Jean Vannier from Université de Lyon indicated to phys.org that these impressions represent early examples of the nervous system design seen in present-day ecdysozoans. This evidence supports the hypothesis that a single ventral nerve cord was the ancestral condition for this group.

Implications for Evolutionary Biology

The study has highlighted evolutionary connections between the structure of the ventral nerve cord and the segmentation of body plans in ecdysozoans. According to statement to phys.org by Dr. Chema Martin-Durán of Queen Mary University of London, the findings propose that the common ancestor of all ecdysozoans likely had a single ventral nerve cord. Changes leading to paired nerve cords, seen in arthropods and kinorhynchs, are believed to have evolved independently, reflecting adaptations to segmented body structures.

Dr. María Herranz from Rey Juan Carlos University suggested that the emergence of paired nerve cords may have enhanced locomotion and coordination in segmented animals during the Precambrian-Cambrian transition. These findings underscore the role of fossil studies in uncovering the complexities of early animal development.

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Antarctica’s Pyramid-Shaped Peak: A Geological Masterpiece

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Antarctica’s Pyramid-Shaped Peak: A Geological Masterpiece

A peak resembling a man-made pyramid, situated in the snow-covered expanse of Antarctica, has captured widespread attention due to its striking symmetry. Located within the southern Ellsworth Mountains, this natural formation features four steep, symmetrical faces, drawing comparisons to ancient Egyptian pyramids. Rising approximately 4,150 feet (1,265 meters), the mountain has become a focal point of speculation since it gained internet fame in 2016, with many questioning whether its shape could be the work of ancient civilizations or extraterrestrial beings.

Natural Formation Through Erosion

As reported by Live Science, the unique geometry of the mountain is attributed to natural erosion processes. Experts suggest that the peak was likely sculpted by freeze-thaw erosion over millions of years. Mauri Pelto, a professor of environmental science at Nichols College, explained to Live Science that during this process, water fills rock crevices during the day, freezes at night, and expands, causing chunks of rock to break off gradually. This slow but consistent erosion is believed to have given the mountain its distinct pyramidal shape. Pelto noted that while three of the mountain’s sides appear to have eroded evenly, the fourth side—the eastern ridge—formed separately.

Conspiracy Theories and Expert Opinions

Speculation about the mountain’s origin surged when its images circulated online. Claims involving forgotten civilizations or extraterrestrial construction have been widely shared by conspiracy theorists. However, Eric Rignot, professor of Earth system science at the University of California, Irvine, and senior research scientist at NASA’s Jet Propulsion Laboratory, dismissed these ideas while talking to Live Science. Rignot stated that pyramid-like shapes are not uncommon in nature, citing that peaks with one or two steep faces are often observed, though fully symmetrical formations are rare.

Historical and Geological Significance

First observed during a 1935 flight by American aviator Lincoln Ellsworth, the Ellsworth Mountains hold significant geological history, including 500-million-year-old fossils. The pyramid-shaped peak adds to the intrigue of this remote region but is regarded by scientists as a testament to nature’s sculpting power rather than evidence of advanced or extraterrestrial involvement.

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Mark Your Calendars! The Next Blue Moon Arrives on May 31, 2026

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Mark Your Calendars! The Next Blue Moon Arrives on May 31, 2026

A Blue Moon, a term often associated with rarity, will next occur on May 31, 2026. This event refers to the second full moon within a single calendar month, a phenomenon that arises due to the lunar cycle of approximately 29.5 days. Typically, 12 full moons are observed annually; however, the slight mismatch between the lunar cycle and the calendar year results in a 13th full moon approximately every two to three years, earning it the designation of a Blue Moon.

Types of Blue Moons Explained

As reported by NASA, there are two classifications of Blue Moons: seasonal and monthly. A seasonal Blue Moon is defined as the third full moon in a season containing four full moons, while a monthly Blue Moon occurs when two full moons appear within the same calendar month. The upcoming Blue Moon in May 2026 will be of the monthly variety.

Despite its name, the moon does not turn blue during this occurrence. The term has historical roots and is now widely accepted to describe these rare lunar events.

Historical Occurrences of Blue Moons

The last Blue Moon was recorded on August 19, 2024. Such events, while uncommon, are predictable and occur at intervals due to the alignment of lunar phases with the Gregorian calendar. The next seasonal Blue Moon is anticipated on August 21, 2032.

Can the Moon Actually Appear Blue?

Instances of the moon appearing blue are exceedingly rare and are attributed to atmospheric conditions rather than lunar phenomena. Volcanic eruptions, such as Krakatoa in 1883, and large-scale forest fires have caused atmospheric particles to scatter red light, giving the moon a bluish tint.

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