Energy News  
EXO WORLDS
Astronomers think 'winking' star is consuming cloud of planetary debris
by Brooks Hays
Washington (UPI) Dec 22, 2017


New data suggests a unique 'winking' star located 550 light-years from Earth is consuming remnants of wrecked planets.

Astronomers believe the periodic dimming of RZ Piscium, a star found in the constellation Pisces, is caused by a giant orbiting cloud of dust formed by the debris of one or more disintegrating planets.

Normally, the large discs of dust and debris found around young stars disperse after a few million years. But RZ Piscium is between 30 million and 50 million years old and the dimming episodes persist, sometimes last a couple of days.

"I've been studying young stars near Earth for 20 years and I've never seen anything like this one," Benjamin Zuckerman, a professor of astronomy at UCLA, said in a news release. "Most sun-like stars have lost their planet-forming disks within a few million years of their birth. The fact that RZ Piscium hosts so much gas and dust after tens of millions of years means it's probably destroying, rather than building, planets."

RZ Piscium produces larger amounts of infrared radiation than the sun, which suggests the star is surrounded by a warm ring of dust. Roughly 8 percent of the star's radiation is emitted in the form of infrared wavelengths, putting the star in rare company. Only a handful of other stars within a few hundred light-years of the solar system emit similar amount of infrared radiation.

Scientists detailed their analysis of RZ Piscium in the Astronomical Journal.

"Our observations show there are massive blobs of dust and gas that occasionally block the star's light and are probably spiraling into it," said Kristina Punzi, a doctoral student at the Rochester Institute of Technology.

Spectral analysis revealed the star's lithium levels, which allowed scientists estimate the star's age. Analysis also revealed the star's surface temperature, 9,600 degrees Fahrenheit, just a bit cooler than the sun. Scientists were also able to measure the temperature of the dust, 450 degrees Fahrenheit, which suggests the cloud is orbiting 30 million miles from the star.

While astronomers believe planetary collisions are the most likely source of the dust cloud surrounding RZ Piscium, they suggest it's also possible the star is stealing material from a stellar companion.

EXO WORLDS
A New Approach for Detecting Planets in the Alpha Centauri System
New Haven CT (SPX) Dec 20, 2017
Yale astronomers have taken a fresh look at the nearby Alpha Centauri star system and found new ways to narrow the search for habitable planets there. According to a study led by Professor Debra Fischer and graduate student Lily Zhao, there may be small, Earth-like planets in Alpha Centauri that have been overlooked. Meanwhile, the study ruled out the existence of a number of larger planet ... read more

Related Links
Lands Beyond Beyond - extra solar planets - news and science
Life Beyond Earth


Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.
SpaceDaily Contributor
$5 Billed Once


credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly


paypal only


Comment using your Disqus, Facebook, Google or Twitter login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle

EXO WORLDS
Air Force Secretary unveils final DMSP satellite at SMC

Arctic and mid-latitudes in complex weather interplay

Space Mystery Solved by Student Satellite

Scientists share various perspectives on ozone layer recovery

EXO WORLDS
First GPS 3 satellite receives commands from new OCX ground control segment

US military imagines war without GPS

New satellite tracking of in-flight aircraft to improve safety

Arianespace's second Ariane 5 launch for the Galileo constellation and Europe

EXO WORLDS
North Atlantic Oscillation dictates timing of tree reproduction in Europe

African deforestation not as great as feared

Cascading use is also beneficial for wood

New maps show shrinking wilderness being ignored at our peril

EXO WORLDS
Microbes help turn Greek yogurt waste into fuel

Algae could feed and fuel planet with aid of new high-tech tool

NREL develops novel method to produce renewable acrylonitrile

Bristol scientists turn beer into fuel

EXO WORLDS
India faces painful move to cleaner energy

U.S. solar power group says it sees headwinds ahead

Global solar photovoltaic installations to exceed 100 Gigawatts in 2018

Glass with switchable opacity could improve solar cells and LEDs

EXO WORLDS
Oil-rich Alberta sees momentum for wind energy

Construction to start on $160 million Kennedy Energy Park in North Queensland

U.S. wind turbines getting taller and more efficient

New wind farm in service off the British coast

EXO WORLDS
Scientists develop new mode of energy generation from bituminous coal

Poland opens Europe's largest coal-fired power unit

Coal demand falling, IEA says

BHP to exit global coal body over climate change policy

EXO WORLDS
Chinese convicts executed after stadium trial; Chinese ink-brush artwork sells for $144M

Three men jailed over Hong Kong explosives plot

Bustling Beijing migrant area turns into ghost town

Chinese dissident's widow sends desperate letter









The content herein, unless otherwise known to be public domain, are Copyright 1995-2024 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. General Data Protection Regulation (GDPR) Statement Our advertisers use various cookies and the like to deliver the best ad banner available at one time. All network advertising suppliers have GDPR policies (Legitimate Interest) that conform with EU regulations for data collection. By using our websites you consent to cookie based advertising. If you do not agree with this then you must stop using the websites from May 25, 2018. Privacy Statement. Additional information can be found here at About Us.