We take a look at the current best predictions for what the solar system will look like throughout the rest of the Sun’s life.
Category: space – Page 41
Did Venus have oceans in its ancient past and could they have supported life as we know it, or even as we don’t know it? This is what a recent study published in Nature Astronomy hopes to address as a team of researchers from the University of Cambridge investigated the climate history of Venus and whether it possessed liquid water oceans on its surface deep in its past. This study holds the potential to help scientists better understand past conditions on planetary bodies throughout the solar system and what this could mean for finding evidence of ancient life beyond Earth.
For the study, the researchers used computer models to estimate how fast the Venusian atmosphere is losing water, carbon dioxide, and carbonyl sulphide molecules, all of which are required to be replenished by volcanic gases so atmospheric stability can be maintained. Therefore, by studying how fast these molecules are leaving the atmosphere, scientists can estimate the amount of present and past volcanic activity on Venus, thus determining if Venus once had oceans of liquid water that might have supported life as we know it. In the end, the researchers determined that Venus is far too dry to have ever possessed bodies of liquid oceans on its surface.
“We won’t know for sure whether Venus can or did support life until we send probes at the end of this decade,” said Tereza Constantinou, who is a PhD student at Cambridge’s Institute of Astronomy and lead author of the study. “But given it likely never had oceans, it is hard to imagine Venus ever having supported Earth-like life, which requires liquid water.”
For the study, the researchers conducted microscopy analyses of a zircon grain obtained from Black Beauty, which builds off a 2022 study involving the same zircon grain where researchers found the grain had experienced being “shocked” from a meteorite impact long ago. For this latest study, the researchers found that the zircon grain contained unique evidence regarding past liquid water on the Red Planet.
“We used nano-scale geochemistry to detect elemental evidence of hot water on Mars 4.45 billion years ago,” said Dr. Aaron Cavosie, who is a senior lecturer in the School of Earth and Planetary Sciences at Curtin University and a co-author on the study. “Hydrothermal systems were essential for the development of life on Earth and our findings suggest Mars also had water, a key ingredient for habitable environments, during the earliest history of crust formation. Through nano-scale imaging and spectroscopy, the team identified element patterns in this unique zircon, including iron, aluminum, yttrium and sodium. These elements were added as the zircon formed 4.45 billion years ago, suggesting water was present during early Martian magmatic activity.”
A mysterious object discovered in the main asteroid belt in 2021 was determined to be a main-belt comet by Planetary Science Institute Senior Scientist Henry Hsieh, Scott Sheppard of the Carnegie Institution for Science and Audrey Thirouin of Lowell Observatory.
Main-belt comets are icy objects found in the asteroid belt between Mars and Jupiter—rather than the cold outer solar system where icy bodies are typically expected. They sport comet-like features, like tails extending away from the sun or fuzzy clouds as the sun’s heat vaporizes their ice. They were first discovered in 2006 at the University of Hawaii by Hsieh and his then-doctoral advisor, David Jewitt.
Main-belt comets belong to a larger group of solar system objects known as active asteroids, which look like comets, but have asteroid-like orbits in the warm inner solar system. This larger group includes objects whose clouds and tails are made of ejected dust produced after an impact or as they quickly rotate, rather than just those that eject dust due to vaporized ice. Both main-belt comets and active asteroids in general are still relatively rare, but scientists are discovering them at a growing clip.
Discovered in 1999 in Germany, the Nebra Sky Disc is the oldest known depiction of the cosmos. A recent examination of the Bronze Age artifact revealed the intricate methods used in its creation, which UNESCO described as “one of the most important archaeological finds of the twentieth century.”
The Nebra Sky Disc is a product of the Únětice culture, which originated in the Bronze Age of Central Europe. It reflects a sophisticated ancient understanding of both metalworking and astronomy and was created sometime between 1800 and 1,600 BCE. Clusters of stars, a sun, and a crescent moon are among the celestial bodies depicted by golden inlays covering the blue-green patina of the Nebra Sky Disc. The angle between the solstices is thought to be indicated by two golden arcs that run along the sides of the disc, one of which is now absent. It is thought that a boat is represented by another arc at the composition’s base. Only a few millimeters thick, the disc has a diameter of around 12 inches.
The Nebra Sky Disc is one of the best-investigated archaeological objects. The origin of the raw materials it is made of is well known The disc is made from copper, tin, and gold—materials whose origins have been traced to Cornwall, England. The rich blue-green patina of the disc’s bronze today results from chemical changes over time. Originally, it would have been a deep bronze hue.
NASA’s Europa Clipper embarks on a 1.8 billion-mile journey to study Jupiter’s moon Europa for potential habitability.
NASA and UCLA scientists speculate on why life on Earth came about from left-handed amino acids and right-handed sugars combining.
When NASA’s Voyager 2 spacecraft flew by Uranus in 1986, it provided scientists’ first—and, so far, only—close glimpse of this strange, sideways-rotating outer planet. Alongside the discovery of new moons and rings, baffling new mysteries confronted scientists. The energized particles around the planet defied their understanding of how magnetic fields work to trap particle radiation, and Uranus earned a reputation as an outlier in our solar system.
Now, new research analyzing the data collected during that flyby 38 years ago has found that the source of that particular mystery is a cosmic coincidence. It turns out that in the days just before Voyager 2’s flyby, the planet had been affected by an unusual kind of space weather that squashed the planet’s magnetic field, dramatically compressing Uranus’s magnetosphere.
“If Voyager 2 had arrived just a few days earlier, it would have observed a completely different magnetosphere at Uranus,” said Jamie Jasinski of NASA’s Jet Propulsion Laboratory in Southern California and lead author of the new work published in Nature Astronomy. “The spacecraft saw Uranus in conditions that only occur about 4% of the time.”
A scientist simulated the contents of the ice giant worlds, and found that a fluid layer may explain each planet’s strange magnetic field.
The Space Coast set a new launch record in 2023 with 72 orbital missions from either Kennedy Space Center and Cape Canaveral Space Force Station. The pace of launches could ramp up by the end of 2024 to a near twice-weekly rate with as many as 111 missions possible.
Check back for the latest information on upcoming launches.