Space Stories: Potential Life on Uranus, a Sick ISS Astronaut, and a Feasting Black Hole

Posted on by onespaceman2000
Image (Credit): Uranus captured the James Webb Telescope’s Near-Infrared Camera (NIRCam). This Webb image also shows 9 of the planet’s 27 moons. (NASA, ESA, CSA, STScI)

—BBC: “New Study on Moons of Uranus Raises Chance of Life“

The Voyager 2 observations had suggested that its two largest moons — Titania and Oberon — often orbit outside the magnetosphere. However, the new study indicates they tend to stay inside the protective bubble, making it easier for scientists to magnetically detect potential subsurface oceans. “Both are thought to be prime candidates for hosting liquid water oceans in the Uranian system due to their large size relative to the other major moons,” Jet Propulsion Laboratory planetary scientist and study co-author Corey Cochrane said.

—Scotsman: “Nasa Astronauts Tight-lipped on Who was Ill After Long Space Station Mission“

Three Nasa astronauts whose prolonged space station mission ended with a trip to hospital last month have declined to say which one of them was sick. Astronauts Matthew Dominick, Michael Barratt and Jeanette Epps publicly discussed their spaceflight for the first time since returning from the International Space Station on October 25.

—NOIRLab: “NSF NOIRLab Astronomers Discover the Fastest-Feeding Black Hole in the Early Universe“

Supermassive black holes exist at the center of most galaxies, and modern telescopes continue to observe them at surprisingly early times in the Universe’s evolution. It’s difficult to understand how these black holes were able to grow so big so rapidly. But with the discovery of a low-mass supermassive black hole feasting on material at an extreme rate, seen just 1.5 billion years after the Big Bang, astronomers now have valuable new insights into the mechanisms of rapidly growing black holes in the early Universe.

Space Stories: Mars MAVEN Hits 10 Years, a Martian Algorithm Helps Earth, and Enormous Black Hole Jets

Posted on by onespaceman2000
Image (Credit): Artist’s rendering of the MAVEN spacecraft above Mars. (NASA)

Here are some recent stories of interest.

—NASA: “Celebrating 10 Years at Mars with NASA’s MAVEN Mission“

A decade ago, on Sept. 21, 2014, NASA’s MAVEN (Mars Atmospheric and Volatile EvolutioN) spacecraft entered orbit around Mars, beginning its ongoing exploration of the Red Planet’s upper atmosphere. The mission has produced a wealth of data about how Mars’ atmosphere responds to the Sun and solar wind, and how these interactions can explain the loss of the Martian atmosphere to space. Today, MAVEN continues to make exciting new discoveries about the Red Planet that increase our understanding of how atmospheric evolution affected Mars’ climate and the previous presence of liquid water on its surface, potentially determining its prior habitability.

—Georgia Tech: “Award-Winning Algorithm Used on Mars Rover Helps Scientists on Earth See Data in a New Way“

A new algorithm tested on NASA’s Perseverance Rover on Mars may lead to better forecasting of hurricanes, wildfires, and other extreme weather events that impact millions globally. Georgia Tech Ph.D. student Austin P. Wright is first author of a paper that introduces Nested Fusion. The new algorithm improves scientists’ ability to search for past signs of life on the Martian surface. This innovation supports NASA’s Mars 2020 mission. In addition, scientists from other fields working with large, overlapping datasets can use Nested Fusion’s methods for their studies. Wright presented Nested Fusion at the 2024 International Conference on Knowledge Discovery and Data Mining (KDD 2024) where it was a runner-up for the best paper award. KDD is widely considered the most prestigious conference for knowledge discovery and data mining research.

—Times of India: “23 Million Light-Years-Wide Black Hole Jets Discovered“

Astronomers have made a breathtaking revelation: The most massive discovered black hole jets, extending on to incredibly 23 million light-years. To look at it through that lens, that’s approximately the length of 140 Milky Way galaxies positioned in a straight line. The immense jets, named ‘Porphyrion’ after a  Greek giant, emerge from a supermassive black hole at the center of a faraway galaxy that was in existence when the universe was only 6.3 billion years old – – close to half its existing age of 13.8 billion years.

Space Stories: Launch of GOES-U Satellite, Jupiter’s Surprising Atmosphere, and the Role of Black Holes in Dark Matter

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Image (Credit): June 25, 2024 launch of NASA’s GOES-U satellite. (SpaceX)

Here are some recent stories of interest.

—America Space: “Falcon Heavy Launches, GOES-U Heads for Geostationary Orbit“

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”.

—European Space Agency: “Jupiter’s Upper Atmosphere Surprises Astronomers“

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.”

—University of Warsaw: “Is Dark Matter Made of Black Holes?“

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.

Space Stories: Astronomical Damage in Ukraine, An Awakened Black Hole, and Understanding Jupiter’s Giant Red Spot

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Image (Credit): Stairwell of the Braude observatory’s main building with a painting of Alexei Leonov, the Soviet cosmonaut who performed the first spacewalk in 1965. (Science.org/Eric Lusito)

Here are some recent stories of interest.

—Science.org: “A Shattered Window to the Radio Sky“

In November 2023, photographer Eric Lusito made a rare visit to the Braude Radio Astronomy Observatory near Kharkiv, Ukraine, once one of the nation’s flagship scientific facilities. Since his visit, the Kharkiv region, which was partly occupied by Russian forces in 2022 but liberated later that year, has again faced a renewed Russian assault. As of this writing, military specialists say that effort has stalled. Here is Lusito’s account of his visit.

—The Guardian: “Astronomers Detect Sudden Awakening of Black Hole 1m Times Mass of Sun“

The mysterious brightening of a galaxy far, far away has been traced to the heart of the star system and the sudden awakening of a giant black hole 1m times more massive than the sun. Decades of observations found nothing remarkable about the distant galaxy in the constellation of Virgo, but that changed at the end of 2019 when astronomers noticed a dramatic surge in its luminosity that persists to this day. Researchers now believe they are witnessing changes that have never been seen before, with the black hole at the galaxy’s core putting on an extreme cosmic light show as vast amounts of material fall into it.

—University of the Basque Country: “Establishing Age and Origin of Jupiter’s Great Red Spot“

As a popular icon among objects in the Solar System, Jupiter’s Great Red Spot (GRS) is probably the best-known atmospheric structure. Its large size (right now its diameter is that of the Earth) and the contrast of its reddish colour against the planet’s pale clouds make it an object that can be easily seen even with small telescopes…Speculation about the origin of the GRS dates back to the first telescopic observations made by the astronomer Giovanni Domenico Cassini, who in 1665 discovered a dark oval at the same latitude as the GRS and named it the ‘Permanent Spot’ (PS), since it was observed by him and other astronomers until 1713. Track of it was subsequently lost for 118 years and it was not until 1831 and later years that S. Schwabe again observed a clear structure, roughly oval in shape and at the same latitude as the GRS; that can be regarded as the first observation of the current GRS, perhaps of a nascent GRS.

Podcast: The Search for Planet Nine

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Image (Credit): Artist’s rendering of a proposed Planet Nine. (NASA/JPL-Caltech)

I listened to a recent Cool Worlds Lab podcast where Professor David Kipping interviewed Professor Malena Rice from Yale University’s Department of Astronomy. The episode, titled  Planet Nine, Oumuamua, Misaligned Exoplanets, covered a good range of topics, as the title suggests.

Of greatest interest to me was the continued search for a ninth planet in our solar system (sorry, Pluto). Professor Rice was noncommittal on the likelihood of such a planet, but she is hoping NASA’s Transiting Exoplanet Survey Satellite (TESS) can help to bring more light to the topic.

She discussed how this ninth planet is estimated to be a sub-Neptune sized planet, which appears to be common in many other solar systems we have observed. Planet Nine is estimated to be a gas giant about 5-10 times the mass of Earth yet smaller than Neptune lying 300-800 astronomical units from the Sun (or about 10 times more distant that Pluto).

Professor Rice noted that it is pretty amazing that we can discover distant galaxies but not potential planets in our backyard. She attributes this difficulty to the lack of light on such a planet.

The podcast episode dives deep in this topic, and then continues into other fascinating topics such as visitors to our solar system and strange solar systems elsewhere. It is a lot to take in, but well worth the time even if you need to play it more than once.

Note: Of course, it may not be a planet at all. One theory is that it is a black hole at the edge of our solar system. I would like to hear that podcast as well.