Sunday October 22, 2017
Home Science & Technology Nearby planet...

Nearby planetary system can be a good model of our early Solar System due to similar Architecture: Study

0
42
Solar system. Pixabay

Washington, May 3, 2017: A nearby planetary system star could be a good model of our early solar system as it has an architecture remarkably similar to that of our own, astronomers have confirmed.

Located 10.5 light-years away in the southern hemisphere of the constellation Eridanus, the star Epsilon Eridani, eps Eri for short, is the closest planetary system around a star similar to the early Sun.

NewsGram brings to you current foreign news from all over the world.

It is a prime location to research how planets form around stars like our Sun, and is also the storied location of the Babylon 5 space station in the science fictional television series of the same name.

“It really is impressive how eps Eri, a much younger version of our solar system, is put together like ours,” said one of the researchers, Kate Su of the University of Arizona in the US.

NewsGram brings to you top news around the world today.

This study, based on data from NASA’s flying observatory, the Stratospheric Observatory for Infrared Astronomy, SOFIA, was published in the Astronomical Journal.

Massimo Marengo, Associate Professor at Iowa State University, and other astronomers have been studying the star and its planetary system since 2004.

In a 2009 scientific paper, the astronomers used data from NASA’s Spitzer space telescope to describe the star’s disc of fine dust and debris left over from the formation of planets and the collisions of asteroids and comets.

They reported the disk contained separate belts of asteroids, similar to the asteroid and Kuiper belts of our solar system.

Subsequent studies by other astronomers questioned that finding.

The new study used SOFIA and Spitzer data to confirm there are separate inner and outer disk structures. (IANS)

Next Story

Spacewalking Astronauts Replace Blurry Camera on Robot Arm

0
16
NASA
This still image provided by NASA shows astronaut Joe Acaba during a spacewalk at the International Space Station on Oct. 20, 2017.

Astronauts went spacewalking Friday to provide some necessary focus to the International Space Station’s robot arm.

The main job for commander Randy Bresnik and teacher-turned-astronaut Joe Acaba was to replace a blurry camera on the new robotic hand that was installed during a spacewalk two weeks ago. The two men were supposed to go spacewalking earlier this week, but NASA needed extra time to rustle up the repair plan.

Sharp focus is essential in order for the space station’s robot hand to capture an arriving supply ship. The next delivery is a few weeks away, prompting the quick camera swap-out.

Orbital ATK, one of NASA’s commercial shippers, plans to launch a cargo ship from Virginia on November 11.

Acaba was barely outside an hour when he had to replace one of his safety tethers, which keep him secured to the orbiting outpost and prevent him from floating away.

Mission Control noticed his red tether seemed frayed and worn and ordered Acaba to “remain put” with his good waist tether locked to the structure as Bresnik went to get him a spare.

Spacewalking astronauts always have more than one of these crucial lifelines in case one breaks. They also wear a jetpack in case all tethers fail and they need to fly back to the space station.

This was the third spacewalk in two weeks for the space station’s U.S. residents. Bresnik performed the first two with Mark Vande Hei.

As they ventured out, Bresnik noted they were flying over Puerto Rico.

“Get out of here,” replied Acaba, the first astronaut of Puerto Rican heritage.

Acaba’s parents were born there, and he still has family on the hurricane-ravaged island.

“There’s a whole line of people looking up and smiling today as you get ready to head out the door,” Bresnik said.

Friday’s spacewalk should be the last one for the year. Early next year, astronauts will replace the hand on the opposite side of the 58-foot robot arm, Canada’s main contribution to the space station. The original latching mechanisms are showing wear and tear since the arm’s launch in 2001.

The 250-mile-high complex is currently home to three Americans, two Russians and one Italian.(VOA)

Next Story

NASA extends Dawn mission at dwarf planet Ceres

0
17
NASA

Washington, Oct 20: NASA has approved a second extension of the Dawn mission at Ceres, the largest object in the asteroid belt between Mars and Jupiter.

During this extension, the spacecraft will descend to lower altitudes than ever before at the dwarf planet, which it has been orbiting since March 2015, the US space agency said on Thursday.

The spacecraft, which has already completed 10 years of spaceflight, will continue at Ceres for the remainder of its science investigation and will remain in a stable orbit indefinitely after its fuel runs out.

Dawn completed its prime mission in June 2016, and its first extension was also approved that year.

The Dawn flight team is studying ways to manoeuvre Dawn into a new elliptical orbit, which may take the spacecraft to less than 200 kilometres from the surface of Ceres at closest approach. Previously, Dawn’s lowest altitude was 385 kilometers.

A priority of the second Ceres mission extension is collecting data with Dawn’s gamma ray and neutron spectrometer, which measures the number and energy of gamma rays and neutrons, NASA said.

This information is important for understanding the composition of Ceres’ uppermost layer and how much ice it contains.

The spacecraft also will take visible-light images of Ceres’ surface geology with its camera, as well as measurements of Ceres’ mineralogy with its visible and infrared mapping spectrometer.

The extended mission at Ceres additionally allows Dawn to be in orbit while the dwarf planet goes through perihelion, its closest approach to the Sun, which will occur in April 2018.

Because of its commitment to protect Ceres from Earthly contamination, Dawn will not land or crash into Ceres.

Instead, it will carry out as much science as it can in its final planned orbit, where it will stay even after it can no longer communicate with Earth.

Mission planners estimate the spacecraft can continue operating until the second half of 2018.

Dawn is the only mission ever to orbit two extraterrestrial targets. It orbited giant asteroid Vesta for 14 months from 2011 to 2012, then continued on to Ceres, where it has been in orbit since March 2015.(IANS)

Next Story

Researchers Claim The Existence Of Planet Nine

Researchers from an American University have laid evidences to prove the presence of Planet Nine

0
544
Planet Nine
Kuiper Belt indicates the presence of Planet Nine
  • The science communities since a long time have been debating upon the existence of Planet Nine. 
  • Space highlights different shreds of evidence based on which scientists are stating the claim.

What Is Planet Nine?

Planet Nine is a hypothetical planet present in the far outer Solar System, whose mass is estimated to be 10 times more than the mass of Earth. The planet is said to be 20 times farther than the sun than Neptune is.

What Do Researchers Have To Say?

Dr Konstantin Batygin, a planetary astrophysicist at the California Institute of Technology, said that there were five different lines of observational evidence which pointed to the existence of Planet Nine. He stated that if this theory does not sound believable, then people would have to come up with the answers of the five pieces of evidence which could lead to further confusion.

Also Read: Five Students from Telangana Selected for the NASA Human Exploration Rover Challenge

Batygin in 2016 published a study examining the six known objects in the Kuiper Belt, a  circumstellar disc in the Solar System beyond the planets that extends from the orbit of Neptune towards interstellar space.

The study examines all the objects have elliptical orbits pointing in the same direction and are tilted the same way. These serve as evidence to the planet’s existence.

It is being said that the objects are tilted 30 degrees downward compared to the plane where the eight official planets circle the sun. Researchers also made use of computer simulations of the solar system including the Planet Nine and to demonstrate that there should be more objects tilted a whopping 90 degrees to solar plane. It was revealed that five such objects, which fit these parameters were already known.

The study led to the birth of two more ideas. Researchers said that this planet could have tilted the planets of the solar system during the last 4.5 billion years.

Planet Nine’s existence could also tell the reason as to why Kuiper Belt objects orbit in the opposite direction as compared to other things in the solar system.

-Prepared by Megha Acharya of NewsGram.

(the story was originally published in PTI)