As an Amazon Associate we earn from qualifying purchases.

astronomy

SPACE: Are Buried Martian “Lakes” Just Frozen Clay?

by
Mars

Bright reflections that radar detected beneath the south pole of Mars may not be underground lakes as previously thought but deposits of clay instead, a new study finds. For decades, scientists have suspected that water lurks below the polar ice caps of Mars, just as it does here on Earth. In 2018, researchers using the MARSIS radar sounder instrument on the European Space Agency’s Mars Express spacecraft detected evidence for a lake hidden beneath the Red Planet’s south polar ice cap, and in 2020, they found signs of a number of super-salty lakes there. If these lakes were remnants of … Read more

SPACE: Water Vapor Detected on Ganymede

by
Ganymede - NASA

In the wisp-thin sky of Jupiter’s moon Ganymede, the largest satellite in the solar system, astronomers have for the first time detected evidence of water vapor, a new study finds. The discovery could shed light on similar watery atmospheres that may envelop other icy bodies in the solar system and beyond, researchers said. Previous research suggested that Ganymede — which is larger than Mercury and Pluto, and only slightly smaller than Mars — may contain more water than all of Earth’s oceans combined. However, the Jovian moon is so cold that water on its surface is frozen solid. Any liquid … Read more

SPACE: Astronomers Find Giant, Ghostly Hand in Space

by
Ghostly Hand

An enormous ghostly hand stretches through the depths of space, its wispy fingers pressing against a glowing cloud. It sounds like science fiction, but it’s quite real, as imagery gathered by NASA’s Chandra X-ray Observatory shows. The “hand” was spawned by the death of a massive star in a supernova explosion, which left behind a fast-spinning, superdense stellar corpse known as a pulsar, Chandra team members said in a description of the dramatic images. Full Story From Live Science

SPACE: The Milky Way Is Warped

by
Milky Way - Pixabay

There’s trouble brewing at the edge of the Milky Way: New measurements suggest that a peculiar distortion of the galactic disk is hardly moving, contradicting earlier reports. As yet, nobody knows which finding will end up being correct. At stake are some key details in the structure and formation of spiral galaxies throughout the universe. Astronomers describe the Milky Way as a flat disk-shaped, double-armed spiral galaxy twirling and twinkling with stars. Yet since the mid-20th century, astronomers have known that this picture is partially wrong. Observations in the radio part of the electromagnetic spectrum first revealed that our galaxy’s … Read more

SPACE: Are There Anti-Matter Stars? We Don’t Know… yet

by
Anti-Matter Star - Deposit Photos

Out of an estimated 100 billion stars in our galaxy, no more than 14 may be made from antimatter. That’s the result from a new study that scoured the Milky Way for signs of antistars — which are identical to regular stars save for the fact that they would burn antimatter at their cores. Though the findings turned up mostly empty this time, researchers haven’t yet fully ruled out the existence of antistars, whose presence would change much about our understanding of the universe. The recent search for antistars can be traced back to 2018, when a $1.5-billion experiment called … Read more

SPACE: What Are Dark Sirens, And Why Should You Care?

by
black hole - pixabay

In recent years, cosmologists have been faced with a crisis: The universe is expanding, but no one can agree on how fast it’s moving away from us. That’s because different ways of measuring the Hubble constant, a fundamental parameter that describes this expansion, have produced conflicting results. But a single, lucky observation of what are known as dark sirens — black holes or neutron stars whose crashes can be picked up by gravitational wave detectors on Earth but remain invisible to ordinary telescopes — could help resolve this tension. As the cosmos expands, galaxies in the universe move away from … Read more

SPACE: We Should Study (And Maybe Seed) Dead Worlds

by
Europa - Image credit: NASA/JPL-Caltech

The search for life in the universe tends to focus on habitable environments. But to answer questions about how life emerged and spread, as well as the limits of habitability, researchers may want to consider looking at dead worlds — and perhaps even (very carefully) seeding them with life. “The biological study of lifelessness seems counterintuitive, because biology is the study of life,” said astrobiologist Charles Cockell of the University of Edinburgh in the U.K. But in a paper set to be published in April in the journal Astrobiology, Cockell makes the case that focusing entirely on living worlds leaves … Read more

SPACE: Dark Streaks on Mars Explained

by
Mars dark streaks - NASA

Evidence of landslides on Mars may also raise the prospects that the Red Planet was once hospitable to life. A new study, published Feb. 3 in the journal Science Advances, found that melting ice is combining with the Red Planet’s salty subsurface permafrost, resulting in a chemical reaction that creates a “liquid-like flowing slush.” Scientists think this slush causes landslides that leave dark, narrow lines known as recurring slope lineae (RSL) on the Martian surface. While the icy slush is currently too salty to harbor life, that may not have been the case 2 billion to 3 billion years ago, … Read more

ASTRONOMY: Ancient Origin of “The Seven Sisters?”

by
Seven Sisters - Deposit Photos

People both modern and ancient have long known of the Pleiades, or Seven Sisters, a small collection of stars in the constellation Taurus. But this famous assembly could point the way to the world’s oldest story, one told by our ancestors in Africa nearly 100,000 years ago, a speculative new study has proposed. To make this case, the paper’s authors draw on similarities between Greek and Indigenous Australian myths about the constellation. But one expert told Live Science that similarities in these myths could be pure chance, not a sign they emerged from a common origin. The Pleiades are part … Read more

Meet Faffarout – The Farthest Object in the Solar System (That We Know About)

by
Farfarout

Astronomers have identified the most distant known object in our solar system — a dwarf planet nicknamed Farfarout that orbits far beyond Pluto. This remote mini-planet swings so far away from the sun that from Farfarout’s perspective Earth and Saturn look like neighbors. With an orbit that’s an average of 132 times the distance between Earth and the sun, or 132 astronomical units (AU), it beats “Farout,” the previous record holder for most-distant solar object; Farout orbits the sun at an average of 124 A.U. Farfarout’s technical name is 2018 AG37, and it will likely get an official name as … Read more