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Sandra Flores

Comet Lovejoy visible in the night sky - 0 views

Observing Tip: Comet Lovejoy visible in the night skyLovejoy has developed over the past few weeks, far better than predicted - the chances of being able to see him in January with the naked eye, a...

started by Sandra Flores on 05 Jan 15 no follow-up yet
Sandra Flores

Comet Lovejoy visible in the night sky - 0 views

Observing Tip: Comet Lovejoy visible in the night skyLovejoy has developed over the past few weeks, far better than predicted - the chances of being able to see him in January with the naked eye, a...

started by Sandra Flores on 09 Jan 15 no follow-up yet
Sandra Flores

Star Formation - 0 views

Heated gas stream at a cool star formation?In the inner regions of a galaxy cluster, astronomers found by Michael McDonald from the Massachusetts Institute of Technology in the USA further evidence...

stars cosmos astronomy

started by Sandra Flores on 02 Nov 14 no follow-up yet
Sandra Flores

First images of the comet - 0 views

Send Mars probes first images of the cometOn Sunday evening, the comet C / 2013 A1 (Siding Spring) is over flown at a distance of almost 140,000 kilometers on Mars. All active Mars probes have surv...

started by Sandra Flores on 05 Jan 15 no follow-up yet
Sandra Flores

First images of the comet - 0 views

Send Mars probes first images of the cometOn Sunday evening, the comet C / 2013 A1 (Siding Spring) is over flown at a distance of almost 140,000 kilometers on Mars. All active Mars probes have surv...

started by Sandra Flores on 09 Jan 15 no follow-up yet
Janos Haits

ClearDarkSky - 3 views

cleardarksky.com

Astronomy Science space cosmology planetary galactic universe solar

shared by Janos Haits on 17 Apr 12 - Cached
  • Janos Haits on 17 Apr 12
     
    Clear Sky Charts are perhaps the most accurate and the most usable forecasters of astronomical observing conditions for over 1900 observatories and observing sites in North America.
Todd Suomela

Phoenix Lander Team: It Snows at Night on Mars | Universe Today - 0 views

www.universetoday.com/...team-it-rains-at-night-on-mars

astronomy planetary Mars observation

shared by Todd Suomela on 03 Jul 09 - Cached
  • Todd Suomela on 03 Jul 09
     
    Phoenix landed at the north arctic region on Mars (68.22°N, 234.25°E) on May 25th, 2008. On Mars, this was just before the summer solstice. Phoenix operated for 5 months, and was able to observe conditions as the seasons changed from summer to winter, giving science teams an unprecedented look at the planet's changing weather patterns, including frost and precipitation.
hanz444

Einstein's Theory of General Relativity - 0 views

www.space.com/theory-general-relativity.html

astronomy science space universe planetary solar galactic astrophysics Physics

shared by hanz444 on 22 Sep 15 - No Cached
  • hanz444 on 22 Sep 15
     
    Einstein's theory of general relativity predicted that the space-time around Earth would be not only warped but also twisted by the planet's rotation. Gravity Probe B showed this to be correct.Credit: NASA In 1905, Albert Einstein determined that the laws of physics are the same for all non-accelerating observers, and that the speed of light in a vacuum was independent of the motion of all observers.
Todd Suomela

Lifeboat News: The Blog » The 'Sustainability Solution' to the Fermi Paradox - 0 views

lifeboat.com/blog

seti fermi-paradox astrobiology astronomy life space intelligence

shared by Todd Suomela on 10 Mar 09 - Cached
  • Todd Suomela on 10 Mar 09
     
    The Sustainability Solution states: the absence of ETI observation can be explained by the possibility that exponential or other faster-growth is not a sustainable development pattern for intelligent civilizations.
Todd Suomela

[astro-ph/0511440] Varying Constants - 0 views

arxiv.org/0511440

cosmology astronomy astrophysics physics paper

shared by Todd Suomela on 29 Jan 09 - Cached
  • Todd Suomela on 29 Jan 09
     
    We review properties of theories for the variation of the gravitation and fine structure 'constants'. We highlight some general features of the cosmological models that exist in these theories with reference to recent quasar data that are consistent with time-variation in the fine structure 'constant' since a redshift of 3.5. The behaviour of a simple class of varying-alpha cosmologies is outlined in the light of all the observational constraints.
Todd Suomela

Guest Post: Tom Levenson on Isaac Newton as the First Cosmologist | Cosmic Variance - 0 views

cosmicvariance.com/...ewton-as-the-first-cosmologist

astronomy astrophysics history physics science sts

shared by Todd Suomela on 05 Jun 08 - Cached
  • To make his ambitions absolutely clear Newton used the same phrase for the title of book three. There his readers would discover “The System of the World.” This is where the literary structure of the work really comes into play, in my view. Through book three, Newton takes his audience through a carefully constructed tour of all the places within the grasp of his new physics. It begins with an analysis of the moons of Jupiter, demonstrating that inverse square relationships govern those motions. He went on, to show how the interaction between Jupiter and Saturn would pull each out of a perfect elliptical orbit; the real world, he says here, is messier than a geometer’s dream.
  • Newton knew what he had done. He was no accidental writer. A parabola, of course, is a curve that keeps on going – and that meant that at the end of a very long and very dense book, he lifted off again from the hard ground of daily reality and said, in effect, look: All this math and all these physical ideas govern everything we can see, out to and past the point where we can’t see anymore. Most important, he did so with implacable rigor, a demonstration that, he argued, should leave no room for dissent. He wrote “The theory that corresponds exactly to so nonuniform a motion through the greatest part of the heavens, and that observes the same laws as the theory of the planets and that agrees exactly with exact astronomical observations cannot fail to be true.” (Italics added).
Janos Haits

Space Telescope Science Institute - 0 views

www.stsci.edu/portal

telescope astronomy planetary space cosmology Astrophysics science physics galactic

shared by Janos Haits on 11 Feb 11 - Cached
  • Janos Haits on 11 Feb 11
     
    The Space Telescope Science Institute enables excellence in astronomical research by optimizing the science from state-of-the-art observational instruments in space.
Janos Haits

Welcome - Texas A&M Astrophysics - 0 views

astronomy.tamu.edu/...Welcome.html

texas Astronomy science universe space cosmology planetary Astrophysics physics

shared by Janos Haits on 18 May 11 - No Cached
  • Janos Haits on 18 May 11
     
    As the newest research area in the Department of Physics & Astronomy, the Astronomy Group is focused on Observational Extragalactic Astronomy and Cosmology, specifically high redshift galaxies, resolved stellar populations, supernovae, and Antarctic telescopes.
Maluvia Haseltine

Study plunges standard Theory of Cosmology into Crisis - 0 views

www.physorg.com/print160726282.html

Astrophysics

shared by Maluvia Haseltine on 25 Jul 09 - Cached
  • Maluvia Haseltine on 25 Jul 09
     
    As modern cosmologists rely more and more on the ominous "dark matter" to explain otherwise inexplicable observations, much effort has gone into the detection of this mysterious substance in the last two decades, yet no direct proof could be found that it actually exists. Even if it does exist, dark matter would be unable to reconcile all the current discrepancies between actual measurements and predictions based on theoretical models. Hence the number of physicists questioning the existence of dark matter has been increasing for some time now.
Todd Suomela

Technology Review: Blogs: arXiv blog: Why ET's genetic code could be just like ours - 0 views

www.technologyreview.com/...23309

exobiology astronomy astrophysics biology life thermodynamics physics

shared by Todd Suomela on 07 Apr 09 - Cached
Andres Ruiz liked it
  • Todd Suomela on 07 Apr 09
     
    "The combined actions of thermodynamics and subsequent natural selection suggest that the genetic code we observe on the Earth today may have significant features in common with life throughout the cosmos."
Todd Suomela

[0904.0402] A thermodynamic basis for prebiotic amino acid synthesis and the nature of ... - 0 views

arxiv.org/0904.0402

arxiv astrobiology exobiology astronomy biology

shared by Todd Suomela on 07 Apr 09 - Cached
Andres Ruiz liked it
  • Todd Suomela on 07 Apr 09
     
    Of the twenty amino acids used in proteins, ten were formed in Miller's atmospheric discharge experiments. The two other major proposed sources of prebiotic amino acid synthesis include formation in hydrothermal vents and delivery to Earth via meteorites. We combine observational and experimental data of amino acid frequencies formed by these diverse mechanisms and show that, regardless of the source, these ten early amino acids can be ranked in order of decreasing abundance in prebiotic contexts. This order can be predicted by thermodynamics. The relative abundances of the early amino acids were most likely reflected in the composition of the first proteins at the time the genetic code originated. The remaining amino acids were incorporated into proteins after pathways for their biochemical synthesis evolved. This is consistent with theories of the evolution of the genetic code by stepwise addition of new amino acids. These are hints that key aspects of early biochemistry may be universal.
Todd Suomela

Stuart Clark's Universe: The Sun Kings - 0 views

www.stuartclark.com/sunkings.html

sts astronomy history book

shared by Todd Suomela on 27 Mar 09 - Cached
  • Todd Suomela on 27 Mar 09
     
    Stuart Clark tells for the first time the full story behind Carrington's observations of a mysterious explosion on the surface of the Sun and how his brilliant insight-that the Sun's magnetism directly influences the Earth-helped to usher in the modern era of astronomy.
Sandra Flores

Strange stars on the heel - 0 views

Strange stars on the heelA new star strange lurks perhaps in our galaxy - and an astrophysicist at the Weizmann Institute is close on the track. Prof. Vladimir Usov from the Weizmann Institute...

started by Sandra Flores on 05 Jan 15 no follow-up yet
Sandra Flores

Strange stars on the heel - 0 views

Strange stars on the heelA new star strange lurks perhaps in our galaxy - and an astrophysicist at the Weizmann Institute is close on the track. Prof. Vladimir Usov from the Weizmann Institute...

started by Sandra Flores on 09 Jan 15 no follow-up yet
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