"Metal-poor stars—containing less than one-thousandth the amount of iron found in the Sun—are some of the rarest objects in the galaxy," said Professor Gary Da Costa from Australia's ARC Center of Excellence in All Sky Astrophysics in 3 Dimensions (ASTRO 3-D) and the Australian National University.
"We've studied 475 of them and found that about 11 percent orbit in the almost flat plane that is the Milky Way's disc.
"They follow an almost circular path—very much like the Sun. That was unexpected, so astronomers are going to have to rethink some of our basic ideas."
In case you are keeping track:
NASA's SpaceX Crew-1 Astronauts Headed to International Space Station | NASA
Ancient star's orbits prompt rethink on Milky Way evolution - Tech Explorist
Australian telescope and European satellite combine to reveal unexpected motions among the galaxy's rarest objects.
Metal-poor stars—containing less than one-thousandth the amount of iron found in the Sun—are some of the Galaxy’s rarest objects. The study of these stars’ orbits has found that some of them travel in previously unpredicted patterns.
According to scientists, theories on how the Milky Way formed are set to be rewritten following discoveries about some of its oldest stars’ behavior.
Pan-STARRS detects 1960s-era rocket booster orbiting Sun | University of Hawaiʻi System News
Earth has captured a tiny object from its orbit about the Sun and will keep it as a temporary satellite for a few months before it escapes. But the object is not an asteroid; it’s likely an upper stage booster rocket that helped lift NASA ‘s ill-fated Surveyor 2 spacecraft toward the Moon in 1966.
University of Hawaiʻi 's Pan- STARRS 1 telescope atop Haleakalā spotted the object in September 2020. Astronomers at the NASA -funded survey telescope noticed it had an unusual motion—it followed a slightly curved path in the sky, which is a signature of it being nearby, with the curvature caused by the rotation of the observer around Earth's axis as Earth spins. Initially assumed to be a regular space rock orbiting the Sun, it was given an asteroid-like designation: 2020 SO .
Many things are taking place:
orbiting fuel depots Archives - SpaceNews
Orbit Fab, a startup preparing to establish fuel depots in space, announced an agreement Nov. 17 with Spaceflight Inc. to send its first microsatellite into orbit in 2021.
Okapi:Orbits releases its first collision avoidance product - SpaceNews
SAN FRANCISCO – Since Germany startup Okapi:Orbits released its first space traffic management product for satellite operators, the response has been overwhelming, Kristina Nikolaus, Okapi:Orbits co-founder and managing director told SpaceNews .
In late October, Okapi began offering publicly an automated collision avoidance service that relies on artificial intelligence to help satellite operators evaluate the risk of collisions and maneuver to avoid other satellites and debris.
Rethinking the Milky Way's evolution - Cosmos Magazine
An investigation into the odd orbits of the galaxy's oldest stars may prompt astronomers to rethink how the Milky Way evolved.
Australian telescopes teamed up with the European Space Agency's Gaia satellite to discover that some of the galaxy's most metal-poor stellar giants travel in surprising patterns.
"Metal-poor stars – containing less than one-thousandth the amount of iron found in the Sun – are some of the rarest objects in the galaxy," says astronomer Gary Da Costa from the Australian National University.
Danger in sun-synchronous orbits
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