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Astronomy posts

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  • August 22, 2013
  • 12:31 PM
  • 795 views

Most of the first stars in the universe were very much massive than our Sun

by Usman Paracha in SayPeople

Main Point:

Researchers have reported that the first generation of stars has a wide mass distribution in the range of 10-1000 solar masses.

Published in:

arXiv

Study Further:

First stars in the universe:

First stars in the universe played an important role in making it as it is now. Their first lights not only started cosmic reionization but also they resulted in the formation heavy elements. They are also thought to start the formation of supermassive black holes.

Solar Mas........ Read more »

Shingo Hirano, Takashi Hosokawa, Naoki Yoshida, Hideyuki Umeda, Kazuyuki Omukai, Gen Chiaki, & Harold W. Yorke. (2013) One Hundred First Stars : Protostellar Evolution and the Final Masses. arXiv. arXiv: 1308.4456v1

  • August 22, 2013
  • 12:30 PM
  • 750 views

Maps and catalogs presented from Herschel Stripe 82 Survey (HerS)

by Usman Paracha in SayPeople

Main Point:

Researchers have presented the first set of maps and band-merged catalog from the Herschel Stripe 82 Survey (HerS). The data is publicly available at http://www.astro.caltech.edu/hers/.

Study Further:

Herschel Space Observatory:

It was the observatory launched by European Space Agency (ESA) and remained active from 2009 to 2013. It has the largest single mirror of about 3.5-metres in diameter that was able to collect information in the far infrared and submillimetre waveb........ Read more »

M. P. Viero, V. Asboth, I. G. Roseboom, G. Marsden, L. Moncelsi, E. Mentuch Cooper, M. Zemcov, G. Addison, A. J. Baker, A. Beelen.... (2013) The Herschel Stripe 82 Survey (HerS): Maps and Early Catalog. arXiv. arXiv: 1308.4399v1

  • August 21, 2013
  • 10:45 AM
  • 688 views

Static compression is involved in the early phases of planet formation

by Usman Paracha in SayPeople

Main Point:

Researchers have proposed that the planet formation starts with the growth of fluffy dust grains that form planetesimals by static compression.

Published in:

Astronomy and Astrophysics

Study Further:

Protoplanetary disk:

This disk refers to the revolving matter of dust and gas surrounding the core of a developing solar system. At last, this disk may result in the formation of planets and asteroids.

Research:

Researchers, in the present study, have determined t........ Read more »

  • August 21, 2013
  • 10:37 AM
  • 663 views

Saturn’s tropic temperature showed a strong increase in one Saturnian year

by Usman Paracha in SayPeople

Main Point:

Researchers have found a strong increase of tropic temperature with time on the tropopause of Saturn.

Published in:

Scientific Reports

Study Further:

Researchers have reported that the tropic (i.e., 30°N–30°S) temperature on the tropopause of Saturn, 6th planet from the Sun, is increasing with time at a high rate.

Researchers used the combined data from the two space missions, i.e. Voyager encounters (1980–81) to the new Cassini reconnaissance (2........ Read more »

Li L, Achterberg RK, Conrath BJ, Gierasch PJ, Smith MA, Simon-Miller AA, Nixon CA, Orton GS, Flasar FM, Jiang X.... (2013) Strong temporal variation over one saturnian year: from voyager to cassini. Scientific reports, 2410. PMID: 23934437  

  • August 20, 2013
  • 11:14 AM
  • 639 views

Prediction for the next activity of the comet 67P/Churyumov-Gerasimenko

by Usman Paracha in SayPeople

Main Point:

Astronomers have predicted that the comet 67P/Churyumov-Gerasimenko would be active in March 2014, when it will reach the distance of 4.3 astronomical units (AU) from the sun.

Published in:

Astronomy and Astrophysics

Study Further:

Astronomical Unit (AU):

It is a unit of distance used in astronomy, especially within the context of solar system. It is equal to the mean distance between the Earth and the Sun, i.e. about 150 million km/93 million mi.

Comet 67P/Chury........ Read more »

  • August 20, 2013
  • 11:01 AM
  • 643 views

Astronomy Concept Inventory (ACI) reliably tells students’ understanding of concepts

by Usman Paracha in SayPeople

Main Point:

Researchers have reported that we can rely on Astronomy Concept Inventory (ACI) to check the conceptual understanding of astronomy concepts by the undergraduate students.

Published in:

Procedia Social and Behavioral Sciences

Study Further:

Astronomy:

Astronomy is one of most interesting subjects, and perhaps that is why the oldest, subject of science. Due to its interesting, many of the science fiction concepts revolve around the astronomical thinking. However, many........ Read more »

Sedef Canbazoglu Bilici et al.,. (2013) The development of an Astronomy Concept Inventory (ACI). Procedia - Social and Behavioral Sciences. DOI: 10.1016/j.sbspro.2011.04.127  

  • August 20, 2013
  • 11:00 AM
  • 693 views

Astronomy Concept Inventory (ACI) reliably tells students’ understanding of concepts

by Usman Paracha in SayPeople

Main Point:

Researchers have reported that we can rely on Astronomy Concept Inventory (ACI) to check the conceptual understanding of astronomy concepts by the undergraduate students.

Published in:

Procedia Social and Behavioral Sciences

Study Further:

Astronomy:

Astronomy is one of most interesting subjects, and perhaps that is why the oldest, subject of science. Due to its interesting, many of the science fiction concepts revolve around the astronomical thinking. However, many........ Read more »

Sedef Canbazoglu Bilici et al.,. (2013) The development of an Astronomy Concept Inventory (ACI). Procedia - Social and Behavioral Sciences. DOI: 10.1016/j.sbspro.2011.04.127  

  • August 5, 2013
  • 02:20 PM
  • 1,243 views

Under leaden skies – where heavy metal clouds the stars

by Perikis Livas in Chilon

In a paper shortly to be published in the Oxford University Press journal Monthly Notices of the Royal Astronomical Society, a team of astronomers from the Armagh Observatory in Northern Ireland report the discovery of two unusual stars with extremely high concentrations of lead in their atmospheres.

(further reading and links at TK's page)... Read more »

Royal Astronomical Society. (2013) Under leaden skies - where heavy metal clouds the stars. RAS News. info:/

  • August 1, 2013
  • 04:05 PM
  • 991 views

A NEW BABY PICTURE OF THE UNIVERSE

by Perikis Livas in Chilon

On July 31, three leading members of the Planck research team — George Efstathiou and Anthony Lasenby of the Kavli Institute for Cosmology at the University of Cambridge, and Krzysztof Gorski, Senior Research Scientist at the Jet Propulsion Laboratory in Pasadena, CA, and faculty member at the Warsaw University Observatory in Poland — answered your questions about what was found and what this means to our understanding of the universe.... Read more »

The Kavli Foundation. (2013) A NEW BABY PICTURE OF THE UNIVERSE. The Kavli Foundation. info:/

  • July 19, 2013
  • 06:12 AM
  • 1,302 views

Earth's Gold Came from Colliding Dead Stars

by Perikis Livas in Chilon

Observations of this GRB provide evidence that it resulted from the collision of two neutron stars – the dead cores of stars that previously exploded as supernovae. Moreover, a unique glow that persisted for days at the GRB location potentially signifies the creation of substantial amounts of heavy elements – including gold.... Read more »

CfA Press Room. (2013) Earth's Gold Came from Colliding Dead Stars. HARVARD-SMITHSONIAN CENTER FOR ASTROPHYSICS. info:/

  • July 18, 2013
  • 11:09 AM
  • 691 views

First ever observation of a cloud ripped apart by a black hole

by Usman Paracha in SayPeople

Main Point:

Astronomers have shown, for the first time, the tearing apart of the gas clouds by the supermassive black hole at the center of the galaxy with the help of ESO’s Very Large Telescope (VLT).

Published in:

Astrophysical Journal

Study Further:

Astronomers have observed that the front part of the cloud is moving away from the black hole at a speed of over 10 million km/h while the tail is still falling towards the black hole.

"The most exciting thing we now ........ Read more »

Stefan Gillessen, Reinhard Genzel, Tobias K Fritz, Frank Eisenhauer, Oliver Pfuhl, Thomas Ott, Marc Schartmann, Alessandro Ballone, & Andreas Burkert. (2013) Pericenter passage of the gas cloud G2 in the Galactic Center. Astrophysical Journal. arXiv: 1306.1374v1

  • July 17, 2013
  • 04:03 PM
  • 1,335 views

Sunset on Mauna Kea

by Olga Vovk in Milchstraße

Big Island (and particularly Mauna Kea) is the preferred place to train Mars rovers... Read more »

Guy Webster, Rachel Hoover, Dwayne Brown. (2012) NASA Rover's First Soil Studies Help Fingerprint Martian Minerals. NASA web site. info:/

  • July 17, 2013
  • 03:47 PM
  • 1,113 views

Cosmologist claims Universe may not be expanding

by Perikis Livas in Chilon

It started with a bang, and has been expanding ever since. For nearly a century, this has been the standard view of the Universe. Now one cosmologist is proposing a radically different interpretation of events — in which the Universe is not expanding at all.... Read more »

  • July 17, 2013
  • 01:04 PM
  • 1,549 views

Could there be life in the clouds of Venus?

by Paul Wren in Venus Dispatches

[note: this post is an excerpt from a literature review paper on Venusian Astrobiology that I wrote last year.]3. Extant Life in the CloudsData returned by Mariner II in 1962 drastically changed the picture of conditions on Venus, causing most to lose interest in it as a harbor for life.  Nevertheless, within just a few years scientists were speculating that life might still survive on Venus in the clouds.  Harold Morowitz and Carl Sagan (1967) published a brief article in Nature conta........ Read more »

  • July 10, 2013
  • 02:20 PM
  • 683 views

Over 60 billion habitable planets probably present in our Milky Way

by Usman Paracha in SayPeople

Main Points:

Scientists have estimated that there could be over 60 billion habitable planets in our Milky Way alone. This estimate is about twice the previous estimates of at least one Earth-sized planet in the habitable zone of each red dwarf star.

Publishing in:

Astrophysical Journal Letters

Study Further:

Previous estimate was made by the researchers from Harvard University and this new thinking has been reported by the researchers from the University of Chicago and Northwester........ Read more »

Jun Yang, Nicolas B. Cowan, & Dorian S. Abbot. (2013) Stabilizing Cloud Feedback Dramatically Expands the Habitable Zone of Tidally Locked Planets. ApJ Letters, 771, L 45, 2013. arXiv: 1307.0515v1

  • July 8, 2013
  • 03:28 AM
  • 1,757 views

MESSENGER spacecraft helps uncover Mercury’s pummelled past

by Stephanie Swift in mmmbitesizescience

In our solar system, Mercury is the teeniest planet, and nestles closest to the sun. Understanding how Mercury developed as the solar system formed is an intriguing question for space science, and a surprising amount of information can be uncovered … Continue reading →... Read more »

  • July 4, 2013
  • 11:56 AM
  • 992 views

There would be no life on Earth after about 2.8 billion years

by Usman Paracha in SayPeople

Main Points:

Scientists have recently proposed that ocean and oxygen would remove from the earth and temperature will rise after about 2 billion years and the life would be completely finished on Earth within about 2.8 billion years.

Published in:

International Journal of Astrobiology

Study Further:

Jack O’Malley James, Ph.D. astrobiologist at the University of St Andrews, has generated a computer model and found that the first changes will take place in the next few billion........ Read more »

  • July 3, 2013
  • 08:06 AM
  • 1,001 views

UCSB Astronomer Uncovers The Hidden Identity Of An Exoplanet

by Perikis Livas in Chilon

Hovering about 70 light-years from Earth –– that's "next door" by astronomical standards –– is a star astronomers call HD 97658, which is almost bright enough to see with the naked eye. But the real "star" is the planet HD 97658b, not much more than twice the Earth's diameter and a little less than eight times its mass. HD 97658b is a super-Earth, a class of planet for which there is no example in our home solar system.... Read more »

UC Santa Barbara News Release. (2013) UCSB Astronomer Uncovers The Hidden Identity Of An Exoplanet . UC Santa Barbara. info:/

  • July 2, 2013
  • 05:33 AM
  • 1,057 views

Intergalactic magnifying glasses could help astronomers map galaxy centres

by Perikis Livas in Chilon

An international team of astronomers may have found a new way to map quasars, the energetic and luminous central regions typically found in distant galaxies. Team leader Prof. Andy Lawrence of the Royal Observatory Edinburgh presents the new results on Monday 1 July at the RAS National Astronomy Meeting in St Andrews, Scotland.... Read more »

RAS Media relations. (2013) Intergalactic magnifying glasses could help astronomers map galaxy centres. Royal Astronomical Society. info:/

  • July 1, 2013
  • 11:43 AM
  • 654 views

Probable Oxygen-richness on Mars about 4 billion years ago

by Usman Paracha in SayPeople

Main Point:

Scientists, last month, reported that the Mars atmosphere was probably rich in oxygen about 4 billion years ago.

Published in:

Nature

Study Further:

Scientists studied the compositions of Martian meteorites present on Earth and the data from NASA’s rovers. They found that surface rocks have five times more nickel than the meteorites.

“What we have shown is that both meteorites and surface volcanic rocks are consistent with similar origins in the deep int........ Read more »

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