Tech & Science: Astronomers Have Detected a Familiar Feature in a Far-Away Solar System - - PressFrom - United Kingdom
  •   
  •   

Tech & Science Astronomers Have Detected a Familiar Feature in a Far-Away Solar System

16:20  02 december  2019
16:20  02 december  2019 Source:   sciencealert.com

Saturn is the solar system's 'moon king,' with 20 more spotted

  Saturn is the solar system's 'moon king,' with 20 more spotted Saturn is the solar system's 'moon king,' with 20 more spottedSaturn is now being recognised as the "moon king" of our solar system, with astronomers spotting 20 more of them orbiting the giant ringed planet, bringing its total count to 82 - three more than Jupiter.

How typical is our Solar System ? The question bedevils planetary scientists, but making detections of analogous features in other planetary systems is pretty hard. Yet astronomers have just made one - of a Kuiper belt-like feature around a star 320.

Astronomers have discovered a far -out world circling the sun. Neptune is 30 astronomical units away , or 2.8 billion miles, and Pluto, currently on the outward leg of Pluto was once regarded as the outer edge of the solar system . But starting in 1992, astronomers discovered a multitude of other icy

Artist's impression of the Kuiper belt. © ESO/M. Kornmesser Artist's impression of the Kuiper belt.

How typical is our Solar System? The question bedevils planetary scientists, but making detections of analogous features in other planetary systems is pretty hard. Yet astronomers have just made one - of a Kuiper belt-like feature around a star 320 light-years away.

It is, they say, the first polarimetric detection of the inner ring circling the star we call HD 141569A. And it's revealing new details about a crucial period of planetary development.

HD 141569A is actually a pretty interesting and well-studied object. It has two very old companions in a trinary system, both red dwarfs at the end of their lives. But HD 141569A is just 5 million years old, around three times the mass of the Sun, of a blue spectral type burning hot and bright.

Astronomers detect gigantic gas waterfalls created by hidden, baby planets

  Astronomers detect gigantic gas waterfalls created by hidden, baby planets When chasing planets, you should go chasing waterfalls.But there seems to be an even more obvious sign a planet may be lurking in the space mist: gigantic waterfalls of gas.

Provisionally named 2018 VG18, it is 120 times further away from the sun than Earth is.

Astronomers have discovered the most distant galaxy ever detected , gaining new insight into the early beginnings of our universe. Identified as EGS-zs8-1, the international team of astronomers measured its exact distance at 13 billion light years away from Earth.

In 1999, a disc was discovered around the young star, with two rings peaking at 220 and 360 astronomical units, respectively. These are the remnants of material that swirled around and accreted into the star as it was forming; over time, bits of material start sticking to each other, accreting into planets.

In HD 141569A's disc, a gap between the two rings suggested that a planet was forming, gravitationally hoovering up all the material in its orbit.

Here in the Solar System, we also have remnants of the Sun's accretion disc from its formation 4.6 billion years ago. We call it the Kuiper belt, and it's a puffy disc of icy debris out beyond the orbit of Neptune. Pluto, at an average distance of 39.5 astronomical units, is in the Kuiper belt.

A transit of Mercury was first seen in 1631 and nearly disregarded

  A transit of Mercury was first seen in 1631 and nearly disregarded The first time the planet was spotted sauntering in front of the sun, it seemed like a mistake. The double take fundamentally reordered our view of the cosmos.Observations of the transit of Mercury have been reported as far back as the ninth century, but after Galileo introduced the telescope in 1610, it became clear that earlier observers were probably seeing sunspots rather than Mercury.

But farther away , the solar winds had less impact on lighter elements, allowing them to coalesce into gas giants. In this way, asteroids, comets "Giant planets form really fast, in a few million years," Kevin Walsh, a researcher at the Southwest Research Institute (SwRI) in Boulder, Colorado, told Space.com.

A mysterious large object is floating around outside our solar system and researchers aren’t sure In the first radio-telescope detection of a planetary-mass object beyond our solar system , astronomers have Its temperature is also far cooler than the sun, at 825 degrees Celsius. It also has a strong

Towards the end of this planetary accretion process, what is left is known as a debris disc, and it can extend hundreds of astronomical units across. The disc around HD 141569A is a hybrid - it's in transition between a protoplanetary disc and a debris disc.

Hybrid discs are fascinating to planetary scientists, since they can tell us about how gas giants form, and how growing planetesimals interact with the gas and dust in the disc.

Now, by studying scattered and twisted electromagnetic radiation from the region around the star, astronomers led by Juan Sebastian Bruzzone of The University of Western Ontario in Canada have imaged a similar ring around HD 141569A, peaking at a distance of 44 astronomical units from the star.

a close up of a rug © Bruzzone et al., arXiv, 2019

And they have found not just evidence of planetary formation, but hints that there's another ring structure in the disc closer to the star.

Something massive blasted X-ray energy into space, and NASA saw it happen

  Something massive blasted X-ray energy into space, and NASA saw it happen We've got it pretty good here on our little blue orb orbiting a relatively chilled-out star, but space is dark and full of terrors. In a new paper published in The Astrophysical Journal, scientists using data from NASA’s NICER telescope reveal the discovery of an absolutely massive energy burst spotted some 11,000 light-years away from Earth. NICER, which is a high-tech sensor installed on the International Space Station, detected the incredible release of energy coming from a system known as SAX J1808.

What astronomers have found about the curious orbit of a small ice world far away reinforces the idea that a large world is hidden out in the solar system . An artist's rendering of a large, unseen ninth planet that some astronomers say must be orbiting our sun at a great distance to explain the orbits of other

A young solar system located a mere 10 light years away appears to be remarkably similar to our Discovered recently in the constellation Eradinus, the solar system surrounding the star Epsilon "There is a gap most likely created by planets," said Marengo. "We haven't detected them yet, but I

Specifically, they found a spiral arm - a feature found in a few other protoplanetary discs, including the two outer rings of HD 141569A, and taken to be the evidence of a forming planet. Based on the features of the spiral arm, the researchers inferred the planet would be around Jupiter's mass or slightly smaller.

They also compared their observed emission to models to find the best fit for the type of dust that could have produced it. But, even with the best-fit models, there was emission that couldn't be accounted for.

However, when another ring located closer to the star was added to the calculations, this solved the problem. A belt between 5 and 15 astronomical units reproduced the emission beautifully.

Aside from the fact that it's pretty danged amazing that astronomers can even achieve such a detection, this is the sort of finely detailed study that can tell us how planets are born.

In turn, that can tell us more about our own Solar System - and knowing how normal or unusual it is can help us figure out how the heck we got here at all.

"Considering resolved imaging data from other high-contrast facilities, the HD 1415169A debris disc shapes up to be made of at least three, and potentially four nested rings, with spiral structures on the three spatially resolved rings," the researchers wrote in their paper.

"As such, it is an excellent laboratory for studying dynamically perturbed discs."

Astronomers Reveal Stunning New Image of The Interstellar Comet Coming Towards Us .
We spotted it in August: a mysterious object shooting through our Solar System on a strange, hyperbolic trajectory implying that, whatever this thing was, it wasn't from around here.Subsequent analysis confirmed this visitor from deep space, now designated 2I/Borisov, was only the second interstellar object ever detected in our Solar System (and the first comet). And we just got a brand-new close-up of it.

—   Share news in the SOC. Networks

Topical videos:

usr: 0
This is interesting!