Post List

Astronomy posts

(Modify Search »)

  • April 13, 2014
  • 01:56 PM
  • 90 views

Intro to External Pulsed Plasma Propulsion (EPPP)

by Jason Carr in Wired Cosmos

External Pulsed Plasma Propulsion (EPPP)  is something that’s been discussed for some time. In fact, it was originally proposed by Stanislaw Ulam way back in 1947. Unfortunately the public perception of atomic technology as well as pieces of otherwise well meaning legislation have called into question the feasibility of spacecraft that operate using this advanced … Read More →... Read more »

  • March 27, 2014
  • 05:18 PM
  • 118 views

First sightings of solar flare phenomena

by Perikis Livas in Tracing Knowledge

Video of magnetic field lines “slipping reconnection” bring scientists a step closer to predicting when and where large flares will occur.



Human civilisation is nowadays maintained by technology and that technology is vulnerable to space weather

Dr Jaroslav Dudik



News Release March 27, 2014 University of Cambridge... Read more »

Dudík, J., Janvier, M., Aulanier, G., Del Zanna, G., Karlický, M., Mason, H., & Schmieder, B. (2014) SLIPPING MAGNETIC RECONNECTION DURING AN X-CLASS SOLAR FLARE OBSERVED BY /AIA . The Astrophysical Journal, 784(2), 144. DOI: 10.1088/0004-637X/784/2/144  

  • February 20, 2014
  • 02:46 AM
  • 154 views

Elements found in two hydrogen atmosphere white dwarfs

by Usman Paracha in SayPeople

Main Points:

Astronomers have reported the chemical composition of two white dwarfs, G29-38 and GD 133, outside the solar system. Oxygen, magnesium, Silicon and Calcium are found in both planetesimals.

Published in:

The Astrophysical Journal

Study Further:

White Dwarf:

It is a small, dim, extremely dense star that has collapsed on itself and is in the final stages of its evolution.

Elements in white dwarfs:

Calcium is the most easily noticed element and has been found in ........ Read more »

S. Xu (许偲艺), M. Jura, D. Koester, B. Klein, B. Zuckerman. (2014) Elemental compositions of two extrasolar rocky planetesimals. The Astrophysical Journal. DOI: 10.1088/0004-637X/783/2/79  

  • February 12, 2014
  • 11:03 AM
  • 199 views

Formation of jets during the death of stars

by Usman Paracha in SayPeople

Main Point:

Astronomers have found that only "strongly interacting" binary stars have the ability to end with powerful, bipolar jets of gas and dust.

Published in:

Monthly Notices of the Royal Astronomical Society

Study Further:

Nebula:

Nebula refers to a region or cloud of interstellar dust and gas appearing variously as a hazy bright or dark patch. It is also called as nebulosity.

Supernova:

Supernova refers to a catastrophic explosion of a large star in the l........ Read more »

  • February 12, 2014
  • 07:36 AM
  • 171 views

Galaxy of about 8 redshift and about 2,300 light-years width

by Usman Paracha in SayPeople

Main Point:

Astronomers have reported the discovery of one of the most distant galaxies, dubbed Abell2744 Y1.

Published in:

Astronomy and Astrophysics Letters

Study Further:

Redshift and previous findings:

Redshift refers to a shift in the spectrum of a celestial body toward longer wavelengths, or toward the red end of the spectrum, caused by its motion away from the Earth.

Previously, scientists reported a galaxy dubbed MACS1149-JD1 at a redshift of about 10, i.e. the galax........ Read more »

N. Laporte, A. Streblyanska, B. Clement, I. Pérez-Fournon, D. Schaerer, H. Atek, F. Boone, J.-P. Kneib, E. Egami, P. Martínez-Navajas, R. Marques-Chaves, R. Pelló, J. Richard. (2014) The first Frontier Fields cluster: 4.5mum excess in a z-8 galaxy candidate in Abell 2744 . Astronomy . DOI: 10.1051/0004-6361/201323179  

  • February 11, 2014
  • 05:32 AM
  • 176 views

One of the strongest indications of water on Mars

by Usman Paracha in SayPeople

Main Points:

NASA spacecraft revolving around and studying Mars have found the strongest indications of water flows on Mars while studying seasonal features.

Published in:

Geophysical Research Letters

Study Further:

In a study by NASA’s Mars Opportunity Rover, it has been observed that water was present on Mars about four billion years ago that was probably supportive of life (DOI: 10.1126/science.1248097)

Now scientists have found some indications of water on Mars in cer........ Read more »

  • February 11, 2014
  • 01:00 AM
  • 190 views

Mass of neutrons can help in solving a cosmological discrepancy

by Usman Paracha in SayPeople

Main Point:

Scientists have measured the mass of ghostly sub-atomic particles called neutrinos for the first time by using the observations of the Big Bang and the curvature of space-time.

Published in:

Physical Review Letters

Study Further:

Cosmic Microwave Background:

Cosmic Microwave Background (CMB) can be referred to as the fading glow of the Big Bang, i.e. oldest light in the Universe.

Study of CMB helps scientists to study and measure accurately different cosmological........ Read more »

  • February 5, 2014
  • 11:43 AM
  • 224 views

Solving a 30-Year-Old Problem in High Mass Star Formation

by Jason Carr in Wired Cosmos

Some 30 years ago, astronomers found that regions of ionized gas around young high mass stars remain small (under a third of a light-year) for ten times longer than they should if they were to expand as expected in simple models. Recent supercomputer simulations predicted that these regions actually flicker in brightness over this period … Read More →... Read more »

C. G. De Pree, T. Peters, M.-M. Mac Low, D. J. Wilner, W. M. Goss, R. Galván-Madrid, E. R. Keto, R. S. Klessen, & A. Monsrud. (2014) Flickering of 1.3 cm Sources in Sgr B2: Toward a Solution to the Ultracompact H II Region Lifetime Problem. The Astrophysical Journal Letters, 781(L36). DOI: 10.1088/2041-8205/781/2/L36  

  • January 29, 2014
  • 04:29 AM
  • 197 views

Hydrogen is connecting galaxies - found about 22 million light-years away

by Usman Paracha in SayPeople

Main Point:

Astronomer has seen the river of hydrogen flowing through space with the help of NSF's Robert C. Byrd Green Bank Telescope (GBT).

Published in:

The Astronomical Journal

Study Further:

The data presented by GBT is showing that the shining hydrogen is present between the larger galaxy and its smaller companions. Hydrogen can be seen in the image in the form of dense hydrogen in orange color and the extremely diffuse and extended field of hydrogen in red color. In th........ Read more »

  • January 24, 2014
  • 10:19 AM
  • 205 views

Neptune-sized planet about 431 light-years away from Earth

by Usman Paracha in SayPeople

Main Point:

Astronomers have found Kepler-410Ab that is a Neptune-sized planet outside of our solar system in a binary star system.

Published in:

The Astrophysical Journal

Study Further:

Kepler-410Ab is found to be rotating around a star present in a binary system named Kepler-410 that is also known as HD 175289 or KOI-42. This system has a fast-rotating planet host star, Kepler-410A, and a fainter companion, Kepler-410B, and is present in the constellation Lyra about 431 light-ye........ Read more »

  • January 21, 2014
  • 10:06 AM
  • 204 views

Quasar reveals “cosmic web” about 10 billion light-years away

by Usman Paracha in SayPeople

Main Points:

Astronomers have found a gas cloud in the Universe that is the largest known to humanity. It is about 2 million light years across and reveals “cosmic web”.

Published in:

Nature

Study Further:

Astronomers utilize the 10-m Keck I Telescope at the W. M. Keck Observatory in Hawaii and found the remote shining quasar UM 287 that shed light on the nearby gas cloud that is the largest known gas cloud, i.e. nebula, in the Universe. It is of about 460,000 parsecs ........ Read more »

  • January 20, 2014
  • 03:02 PM
  • 260 views

Gaia-ESO data show Milky Way may have formed ‘inside-out’, and provide new insight into Galactic evolution

by Perikis Livas in Tracing Knowledge

Research on first data release from Gaia-ESO project suggests the Milky Way formed by expanding out from the centre, and reveals new insights into the way our Galaxy was assembled.

20 Jan 2014 University of Cambridge

We have been able to shed new light on the timescale of chemical enrichment across the Milky Way disc, showing that outer regions of the disc take a much longer time to form

Maria Bergemann... Read more »

  • January 19, 2014
  • 05:17 PM
  • 268 views

Distant quasar illuminates a filament of the cosmic web

by Perikis Livas in Tracing Knowledge

Astronomers have discovered a distant quasar illuminating a vast nebula of diffuse gas, revealing for the first time part of the network of filaments thought to connect galaxies in a cosmic web.

Further reading... Read more »

Jörg P. Dietrich, Norbert Werner, Douglas Clowe, Alexis Finoguenov, Tom Kitching, Lance Miller, & Aurora Simionescu. (2012) A filament of dark matter between two clusters of galaxies. Nature. DOI: 10.1038/nature11224  

  • January 17, 2014
  • 08:59 AM
  • 234 views

Interesting facts about the moon

by Usman Paracha in SayPeople

Moon is the only natural satellite of Earth. People want to read about different facts about the moon and you probably have also come after searching.

We want to read about the facts but space agencies are working on the facts. Major space agencies of the world including NASA, ESO and the China National Space Administration are considering sending first manned missions to the satellite by the year 2020. India and Japan are also showing interests to send missions by that time.

Here, I have ........ Read more »

Christian Cajochen, Songül Altanay-Ekici, Mirjam Münch, Sylvia Frey, Vera Knoblauch, Anna Wirz-Justice. (2013) Evidence that the Lunar Cycle Influences Human Sleep. Current Biology. DOI: 10.1016/j.cub.2013.06.029  

  • January 15, 2014
  • 08:34 AM
  • 221 views

Space planets found about 2,500 light years away from us

by Usman Paracha in SayPeople

Main Points:

Scientists have found a planet about 2,500 light years away in the star cluster Messier 67. This planet has been discovered by using European Southern Observatory Harps planet hunter in Chile.

Published in:

Astronomy & Astrophysics

Study Further:

This planet is present in the constellation Cancer (The Crab) having about 500 stars. This cluster Messier 67 is about 4 billion years old, i.e. almost of the same age as that of Earth and Sun.

This planet in space is of s........ Read more »

  • January 14, 2014
  • 11:09 AM
  • 214 views

Discovery of a new exoplanet at a distance of 250 light years

by Usman Paracha in SayPeople

Main Point:

Astronomers have found a new giant planet, HD 4203c, outside of our solar system rotating around a neighboring G5 star HD 4203.

Published in:

arXiv

Study Further:

HD 4203c is rotating around its star in a time of 18.2 years of Earth. This planet is found to be of mass of about 2.17 times that of Jupiter. HD 4203 is located about 250 light years away from us in the constellation Pisces.

This star system is same as the other three systems with extrasolar planets, HD 1........ Read more »

Stephen R. Kane, Steve B. Howell, Elliott P. Horch, Ying Feng, Natalie R. Hinkel, David R. Ciardi, Mark E. Everett, Andrew W. Howard, & Jason T. Wright. (2014) Limits on Stellar Companions to Exoplanet Host Stars With Eccentric Planets. arXiv. arXiv: 1401.1544v1

  • January 11, 2014
  • 06:43 PM
  • 258 views

“Hypervelocity stars” have more speed than our galaxy

by Usman Paracha in SayPeople

Main Point:

Scientists have found a new class of stars in universe, dubbed as "hypervelocity stars" moving with such a high speed that they are out of gravitational grip of the Milky Way galaxy.

Published in:

Astrophysical Journal

Study Further:

Our universe is full of stars and usually, the stars come from the center of our galaxy. However, these new types of stars are not found to come from the center of our galaxy.

“These new hypervelocity stars are very diff........ Read more »

  • January 10, 2014
  • 08:32 AM
  • 238 views

“Super-Earths are habitable” and could have Earth-like climate

by Usman Paracha in SayPeople

Main Points:

Scientists have reported that “super-Earths” in our galaxy have more chances of having climate similar to Earth. These chances are more than our previous expectations.
Published in:

Astrophysical Journal

Study Further:

Before this research, it was commonly thought that super-Earths are unlike Earth. However, after this research, we know that super-Earths would be “waterworlds” having most of the water in the mantle - the part of the Earth or anot........ Read more »

  • January 8, 2014
  • 05:05 PM
  • 269 views

BOSS Measures the Universe to One-Percent Accuracy

by Perikis Livas in Tracing Knowledge

The Baryon Oscillation Spectroscopic Survey makes the most precise calibration yet of the universe’s “standard ruler”

Further reading and links at TK's page... Read more »

  • January 2, 2014
  • 10:40 AM
  • 247 views

New discovery supports an old idea of binary-star formation

by Usman Paracha in SayPeople

Main Point:

Scientists have presented new study that is supporting one of the theories about the formation of binary-stars.

Published in:

The Astrophysical Journal

Study Further:

Binary star is a pair of stars that revolve around their common center of mass under mutual gravitational attraction. Nearly half of all Sun-like stars comprise double or multiple-star systems but the mechanism behind the formation of such systems was not clear.

"The only way to resolve the debate........ Read more »

join us!

Do you write about peer-reviewed research in your blog? Use ResearchBlogging.org to make it easy for your readers — and others from around the world — to find your serious posts about academic research.

If you don't have a blog, you can still use our site to learn about fascinating developments in cutting-edge research from around the world.

Register Now

Research Blogging is powered by SMG Technology.

To learn more, visit seedmediagroup.com.