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Is this the First Time an Atmospheric Rainbow has been Spotted on an Exoplanet?

Scientists have made a groundbreaking discovery in the realm of exoplanet atmospheres – the first observation of a atmospheric rainbow, known as a “glory”, on an exoplanet. This incredible finding sheds light on the unique atmospheric conditions of distant worlds and offers a glimpse into the mesmerizing phenomena that occur beyond our own solar system.

When light interacts with the atmosphere of a planet, remarkable optical effects can occur. From rainbows to halos, these phenomena are a result of the intricate interplay between sunlight and the particles present in the atmosphere. The glory effect, in particular, creates a colorful halo around objects and is a mesmerizing sight to behold.

The discovery of a glory on the exoplanet WASP-76b was made possible by the Characterising ExOplanet Satellite (Cheops) and other observatories. WASP-76b is not your typical exoplanet – it is a hot Jupiter with scorching surface temperatures, far removed from the temperate conditions of Earth. Despite this harsh environment, astronomers were able to detect the presence of a glory on this distant world.

A solar glory seen from an airplane. Credit: Brocken Inaglory

What makes this discovery even more significant is the insight it provides into the atmospheric composition of WASP-76b. The asymmetry observed in the planet’s atmosphere hints at complex dynamics at play, with one side facing intense heat and the other shrouded in darkness. The presence of a glory on the eastern terminator of the planet suggests the existence of spherical droplets in the atmosphere, adding to the mystery of this alien world.

The findings published in the journal Astronomy & Astrophysics offer a tantalizing glimpse into the diverse and fascinating atmospheres of exoplanets. The ability of modern telescopes to capture such subtle phenomena opens up new avenues for studying the atmospheric properties of distant worlds and unraveling the mysteries of the cosmos.

This groundbreaking discovery of the first atmospheric rainbow on an exoplanet marks a significant milestone in our understanding of the universe. As we gaze across the vast expanse of space, each new observation brings us closer to unlocking the secrets of worlds beyond our own.

Reference: Demangeon, O. D. S., et al. “Asymmetry in the atmosphere of the ultra-hot Jupiter WASP-76 b.” Astronomy & Astrophysics 684 (2024): A27.

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University of Wisconsin-Milwaukee and Protesters reach an agreement to dismantle encampment

Protesters at the University of Wisconsin-Milwaukee have agreed to end their pro-Palestinian encampment following an agreement reached with the school, university officials announced on Sunday. The encampment, which had been in place for two weeks, will be dismantled by Tuesday, marking the end of what was believed to be the last standing encampment at a Wisconsin college.

University officials had allowed the encampment to remain on a patch of lawn between Mitchell Hall and a busy thoroughfare on the campus’s southern boundary, opting not to involve law enforcement. This approach differed from the response at the University of Wisconsin-Madison, where police were called in to remove tents after negotiations fell through. Despite initial efforts to disband the encampment, Wisconsin-Madison eventually reached an agreement with protesters to voluntarily dismantle the camp prior to commencement ceremonies.

Chancellor Mark Mone of Wisconsin-Milwaukee stated last Wednesday that the university had exhibited “the widest possible amount of patience and restraint.” However, he also cautioned that patience was wearing thin and hinted at potential action by the school. Following discussions with the UWM Popular University for Palestine Coalition, the university agreed to advocate for a cease-fire between Israel and Hamas, condemn the destruction of schools and universities in Gaza by Israeli forces, and hold meetings with protest leaders regarding university investments.

Additionally, the university pledged to urge the Water Council, a Milwaukee organization of water technology companies, to sever connections with two Israeli government-owned entities, Mekorot and the Israel Innovation Authority. Chancellor Mone serves as the treasurer on the Water Council’s board of directors.

In return for these commitments, the protesters agreed to dismantle the encampment beginning on Sunday and completing the process by Tuesday. They also agreed not to disrupt the university’s commencement ceremonies scheduled for Sunday. In a statement, the protesters expressed their satisfaction with the agreement, stating, “After hard fought edits and careful consideration by the coalition, we determined we had obtained all possible benefits from the encampment.”

The resolution of the encampment at the University of Wisconsin-Milwaukee represents a successful outcome of negotiations between university officials and protesters. By reaching a compromise that addresses the concerns of both parties, a peaceful resolution has been achieved, allowing for the encampment to be taken down without incident.

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