Space Stories: Finding Water on Mars, Mini Solar Sails, and a Balloon-borne Telescope

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Image (Credit): Image of Mars. (NASA)

Here are some recent stories of interest.

—Planetary Science Institute: “Vast, Potential Ice-Rich Deposit Found in Martian Equatorial Region“

A potential ice-rich portion of the Medusae Fossae Formation deposits may contain the largest volume of water in the equatorial region of Mars. Data from the Mars Advanced Radar for Subsurface and Ionospheric Sounding (MARSIS) –  a subsurface radar sounder on the Mars Express orbiter searching for water and studying the Martian atmosphere – reveals layering in the Medusae Fossae Formation (MFF) deposits. These layers are likely due to transitions between mixtures of ice-rich and ice-poor dust, analogous to those in Polar Layered Deposits, according to the paper “Evidence of Ice-Rich Layered Deposits in the Medusae Fossae Formation of Mars” in Geophysical Research Letters. 

—University of California: “Small Solar Sails Could be the Next ‘Giant Leap’ for Interplanetary Space Exploration“

Nearly 70 years after the launch of the first satellite, we still have more questions than answers about space. But a team of Berkeley researchers is on a mission to change this with a proposal to build a fleet of low-cost, autonomous spacecraft, each weighing only 10 grams and propelled by nothing more than the pressure of solar radiation. These miniaturized solar sails could potentially visit thousands of near-Earth asteroids and comets, capturing high-resolution images and collecting samples.

—NASA: “NASA’s GUSTO Prepares to Map Space Between the Stars“

On a vast ice sheet in Antarctica, scientists and engineers are preparing a NASA experiment called GUSTO to explore the universe on a balloon. GUSTO will launch from the Ross Ice Shelf, near the U.S. National Science Foundation’s McMurdo Station research base, no earlier than Dec. 21. GUSTO, which stands for Galactic/Extragalactic ULDB Spectroscopic Terahertz Observatory, will peer into the space between stars called the interstellar medium. The balloon-borne telescope will help scientists make a 3D map of a large part of the Milky Way in extremely high-frequency radio waves. Examining a 100-square-degree area, GUSTO will explore the many phases of the interstellar medium and the abundances of key chemical elements in the galaxy.

Space Stories: Old Stars Harboring Exoplanets, a Hot “Earth” Located, and the Role of Exomoons

Posted on by onespaceman2000
Image (Credit): Artist’s rendering of an Earth-like exomoon orbiting a gas giant planet in a star’s habitable zone. (NASA/JPL-Caltech)

Here are some recent stories of interest related to exoplanets.

—Phys.org: “Old Stars May Be the Best Places to Search for Life“

Once upon a cosmic time, scientists assumed that stars apply an eternal magnetic brake, causing an endless slowdown of their rotation. With new observations and sophisticated methods, they have now peeked into a star’s magnetic secrets and found that they are not what they expected. The cosmic hotspots for finding alien neighbors might be around stars hitting their midlife crisis and beyond. This groundbreaking study, shedding light on magnetic phenomena and habitable environments, has been published in The Astrophysical Journal Letters.

—NASA: “Earth-sized Planet Has a ‘Lava Hemisphere’“

In a system with two known planets, astronomers spotted something new: a small object transiting across the Sun-sized star. This turned out to be another planet: extra hot and Earth-sized…The newly-spotted planet, called HD 63433 d, is tidally locked, meaning there is a dayside which always faces its star and a side that is constantly in darkness. This exoplanet, or planet outside of our solar system, orbits around the star HD 63433 (TOI 1726) in the HD 63433 planetary system. This scorching world is the smallest confirmed exoplanet younger than 500 million years old. It’s also the closest discovered Earth-sized planet this young, at about 400 million years old.

—UniverseToday: “Big Planets Don’t Necessarily Mean Big Moons’”

Does the size of an exomoon help determine if life could form on an exoplanet it’s orbiting? This is something a February 2022 study published in Nature Communications hopes to address as a team of researchers investigated the potential for large exomoons to form around large exoplanets (Earth-sized and larger) like how our Moon was formed around the Earth. Despite this study being published almost two years ago, its findings still hold strong regarding the search for exomoons, as astronomers have yet to confirm the existence of any exomoons anywhere in the cosmos. But why is it so important to better understand the potential for large exomoons orbiting large exoplanets?

Space Stories: A Volcanic Moon, an Indian X-ray Launch, and New Chinese Communication Satellites

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Image (Credit): JunoCam image of Jupiter’s moon Io during its close encounter. The image was taken at an altitude of about 1,500 miles. (NASA JPL and Southwest Research Institute)

Here are some recent stories of interest.

—Forbes: “A NASA Spacecraft Just Had A Close Encounter With A Volcanic Moon—See The Stunning First Image“

NASA’s spacecraft Juno just had a super-close encounter with the most volcanic world in the solar system—but its stunning first image could be among its last after 56 orbits of Jupiter. On December 30, the bus-sized spacecraft—orbiting Jupiter since 2016—got very close to Io, the giant moon of Jupiter. It reached a mere 930 miles (1,500 kilometers) from the moon’s surface. However, the spacecraft’s camera has suffered radiation damage and may not last much longer.

—Fox51 News: “India Kicks Off 2024 with X-ray Astronomy Satellite Launch“

India began 2024 with the launch of an X-ray astronomy satellite aboard the sixtieth flight of its Polar Satellite Launch Vehicle. The PSLV C58 mission lifted off at 9:10 AM local time (03:40 UTC) on Monday, Jan. 1, from the Satish Dhawan Space Centre. XPoSat, or X-ray Polarimeter Satellite, carries a pair of instruments that will be used to study X-ray emissions from astronomical sources. After deploying XPoSat, PSLV C58’s upper stage has remained in orbit as the third flight of the PSLV Orbital Experimental Module (POEM-3), serving as a free-flying platform hosting a range of attached payloads.

—SpaceNews: “First Satellite for Chinese G60 Megaconstellation Rolls Off Assembly Line“

The first satellite for a second planned Chinese low Earth orbit communications megaconstellation has been produced in new facilities in Shanghai. A new generation flat-panel satellite rolled off the assembly at the G60 digital satellite production factory in Shanghai’s Songjiang District Tuesday, Dec. 27, according to Chinese press reports. The satellite is the first for the G60 Starlink low Earth orbit communications megaconstellation. An initial 108 satellites of a total of around 12,000 G60 Starlink satellites are to be launched across 2024.

Space Stories: An International Astronaut for Artemis, Martian Eruptions, and Surprisingly Young Stars in Our Galaxy

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Here are some recent stories of interest.

—Politico: “NASA’s Moon Landing Mission will Include a Non-American, Harris Says“

NASA is hoping to send a group of astronauts to the moon before the end of the decade, and at least one of them won’t be American. During a National Space Council meeting Wednesday afternoon, Vice President Kamala Harris announced that an astronaut from another country will join the U.S. team…It’s a major diplomatic move for Washington as it attempts to build an international coalition in space to counter a similar initiative being pursued by China, which the U.S. believes is gearing up for future battles in orbit. Harris didn’t specify which nation will provide the astronaut.

—University of Arizona: “Recent Volcanism on Mars Reveals a Planet More Active Than Previously Thought“

A vast, flat, “featureless” plain on Mars surprised researchers by revealing a much more tumultuous geologic past than expected, according to a study led by researchers at the University of Arizona. Enormous amounts of lava have erupted from numerous fissures as recently as one million years ago, blanketing an area almost as large as Alaska and interacting with water in and under the surface, resulting in large flood events that carved out deep channels...Mars has long been thought to be a geologically “dead” planet where not much is happening. Recent discoveries have researchers questioning this notion,

—ScienceNews: “A Bar of Stars at the Center of the Milky Way Looks Surprisingly Young“

The biography of our home galaxy may be due for some revisions. That’s because a bar-shaped collection of stars at the center of the Milky Way appears to be much younger than expected. The bar is a prominent feature of our galaxy. It spans thousands of light-years and links the galaxy’s spiraling arms of stars, making them resemble streams of water coming from a spinning lawn sprinkler.

Space Stories: Tom Hanks Returns to the Moon, Exomoons are Questioned, and Our Moon Enters a New Phase

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Image (Credit): Tom Hanks at the opening of his new show in London. (Apollo Remastered)

Here are some recent stories of interest.

—Reuters: “Tom Hanks Brings Love of Space to New Immersive London Show“

Archive footage of space rockets taking off beam across giant walls in a new immersive show in London, as Hollywood actor Tom Hanks narrates the story of human voyages to the moon. “The Moonwalkers: A Journey With Tom Hanks” looks at the first moon landings of the Apollo missions from 1969 to 1972 and their successor, NASA’s human spaceflight program, Artemis. The next mission – the Artemis II lunar flyby – is planned for next year and interviews with the four-member team are also projected on the walls at the Lightroom gallery space in London’s King Cross area.

—Max Planck Institute for Solar System Research: “Giant Doubts About Giant Exomoons“

Just as it can be assumed that the stars in our Milky Way are orbited by planets, moons around these exoplanets should not be uncommon. This makes it all the more difficult to detect them. So far, only two of the more than 5300 known exoplanets have been found to have moons. A new data analysis now demonstrates that scientific statements are rarely black or white, that behind every result there is a greater or lesser degree of uncertainty and that the path to a statement often resembles a thriller. In observations of the planets Kepler-1625b and Kepler-1708b from the Kepler and Hubble space telescopes, researchers had discovered traces of such moons for the first time. A new study now raises doubts about these previous claims. As scientists from the Max Planck Institute for Solar System Research and the Sonnenberg Observatory, both in Germany, report in the journal Nature Astronomy, “planet-only” interpretations of the observations are more conclusive.

—The University of Kansas: “Scholars Say it’s Time to Declare a New Epoch on the Moon, The ‘Lunar Anthropocene’“

Human beings first disturbed moon dust Sept. 13, 1959, when the USSR’s unmanned spacecraft Luna 2 alighted on the lunar surface. In the following decades, more than a hundred other spacecraft have touched the moon — both crewed and uncrewed, sometimes landing and sometimes crashing. The most famous of these were NASA’s Apollo Lunar Modules, which transported humans to the moon’s surface to the astonishment of humankind. In the coming years, missions and projects already planned will change the face of the moon in more extreme ways. Now, according to anthropologists and geologists at the University of Kansas, it’s time to acknowledge humans have become the dominant force shaping the moon’s environment by declaring a new geological epoch for the moon: the Lunar Anthropocene.