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Dark Energy Survey @TheDESurvey
Sep 02
w_a=?

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Dark Energy Survey @TheDESurvey
Aug 31
RT @NOIRLabAstro:The sky over @CerroTololo, a Program of @NOIRLabastro, is here densely packed with a brilliant array of curving lin… https://t.co/1AVpCu0Xog

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Dark Energy Survey @TheDESurvey
Aug 26
RT @jlynnmuir:Feeling famous because this article mentions the talk I gave this week at #cosmo22 🇧🇷, quotes my fantastic analysis… https://t.co/PzIOs55ien

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Dark Energy Survey @TheDESurvey
Aug 25
RT @agnes_cosmos:Ecstatic to see our @theDESurvey work highlighted in JPL news! I spent a lot of my time as a @NASAJPL postdoc worki… https://t.co/0jhDSBOBco

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Dark Energy Survey @TheDESurvey
Aug 17
RT @ZierlerDavid:Marcelle Soares-Santos of @UmichPhysics remembers childhood in Brazil, physics @usponline, galaxy clusters… https://t.co/CScTOE8ZFw

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The Dark Energy Survey

3 days ago

Timeline photosStar Sweeps 💫

In this #imageoftheweek, the sky over Cerro Tololo Inter-American Observatory (CTIO), a Program of NOIRLab is here densely packed with a brilliant array of curving lines, looking a little like a well-lit wheel that has been sent spinning. In fact, this light streak effect is indeed due to something spinning — Earth!

The photographer has used a very long exposure to capture this image, so not only is Cerro Tololo visible in sharp detail, but the rotation of Earth on its own axis can be “seen” in the movement of the stars. The center of the circular effect, where the star streaks seem to be rippling out from a point in the upper left of the image, indicates the Earth’s southern geographic pole, i.e., the southern end of the Earth’s axis of rotation.

Credit: CTIO/NOIRLab/NSF/AURA/Babak A. Tafreshi
noirlab.edu/public/images/iotw2235a/
#stars #astronomy #cerrotololo #NSFunded #telescope ... See MoreSee Less
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The Dark Energy Survey

1 week ago

Check out this article on our latest studies of dark energy and gravity! ... See MoreSee Less
NASA Scientists Help Probe Dark Energy by Testing Gravity
www.jpl.nasa.gov
Could one of the biggest puzzles in astrophysics be solved by reworking Albert Einstein’s theory of gravity? A new study co-authored by NASA scientists says not yet.
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The universe is expanding at an accelerating rate, and I know why. Whole universe is conscious, even the energy of atoms, energy of subatomic particles and dark energy of the cosmos as well. Scientists need to know what is inside the black hole and what happened during the Planck Epoch and Grand Unification Epoch. Watch this video to learn more about the same youtu.be/aqTheDhykS4
Congratulations
The Dark Energy Survey

3 weeks ago

#desimages (credit: Ellesa Henning) ... See MoreSee Less
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Cool!! Nice!!
The Dark Energy Survey

3 weeks ago

#desimages (credit: Ellesa Henning) ... See MoreSee Less
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So nice i had to say it on two platforms!!! What an awesome picture!!!
Starship Enterprise Galaxy (r) meets Borg galaxy (on left, Borg icon of a hand, upside-down)
The Dark Energy Survey

1 month ago

Time for another edition of the Darchives! Our year-3 analysis involved 100+ scientists and ~30 papers! But what does it all mean? Today's darchive connects our measurements to insights on the physics of the Universe.

www.darkenergysurvey.org/darchive/confronting-models-with-des-year-3-data-or-how-did-we-get-here-...

(Repost from KIPAC research highlights) ... See MoreSee Less
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Is dark matter and dark energy follow E = mc2
wave particle duality
or E = hv

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News

Scientists Leverage HPC and AI to Wrangle the ‘Galaxy Zoo’

July 8, 2019 12:00 pm

The research team developed a new approach to classifying these hundreds of millions of galaxies. Instead of relying on crowdsourced classification, the researchers used knowledge from the state-of-the-art Xception neural network, combined with the datasets generated by the Galaxy Zoo project, to train its deep learning models. They then applied the trained model to galactic images from the Dark Energy Survey (DES) – where it achieved a 99.6% accuracy in identifying spiral and elliptical galaxies.

Three sky surveys completed in preparation for Dark Energy Spectroscopic Instrument

July 8, 2019 12:00 pm

It took three sky surveys — conducted at telescopes in two continents, covering one-third of the visible sky, and requiring almost 1,000 observing nights – to prepare for a new project that will create the largest 3-D map of the universe’s galaxies and glean new insights about the universe’s accelerating expansion. This Dark Energy Spectroscopic Instrument (DESI) project will explore this expansion, driven by a mysterious property known as dark energy, in great detail. It could also make unexpected discoveries during its five-year mission.

Multiple Measurements close in on Dark Energy

May 6, 2019 12:00 pm

An extensive analysis of four different phenomena within the universe points the way to understanding the nature of dark energy, a collaboration between more than 100 scientists reveals. Dark energy – the force that propels the acceleration of the expanding universe – is a mysterious thing. It’s nature, write telescope scientist Timothy Abbott from the Cerro Tololo Inter-American Observatory, in Chile, and colleagues, “is unknown, and understanding its properties and origin is one of the principal challenges in modern physics”. Indeed, there is a lot at stake. Current measurements indicate that dark energy can be smoothly incorporated into the theory of general relativity as a cosmological constant; but, the researchers note, those measurements are far from precise and incorporate a wide range of potential variations.

Viewpoint: Dark Energy Faces Multiple Probes

May 1, 2019 12:00 pm

One of the top goals in cosmology today is understanding the dark energy that is responsible for the accelerated expansion of the Universe. Is the dark energy consistent with the cosmological constant of general relativity—representing a constant energy density filling space homogenously? Or can we find deviations from general relativity on cosmological scales that suggest a more complex nature for gravity? Questions like these motivate the current and next generations of surveys that aim to map out ever larger volumes of the Universe, using a wide variety of probes to constrain the properties of dark energy. The Dark Energy Survey (DES) has now derived such constraints from the combined analysis of four canonical observables related to dark energy: supernovae, baryon acoustic oscillations, gravitational lensing, and galaxy clustering [1]. The resulting bounds confirm what we knew from previous studies, which focused on single probes. But the results indicate that this multiprobe approach could allow surveys in the 2020s to improve such constraints by orders of magnitude, possibly bringing us close to solving the dark energy puzzle.

Supernovae, Dark Energy, and the Fate of Our Universe

April 5, 2019 12:00 pm

What’s the eventual fate of our universe? Is spacetime destined to continue to expand forever? Will it fly apart, tearing even atoms into bits? Or will it crunch back in on itself? New results from Dark Energy Survey supernovae address these and other questions. At present, the fabric of our universe is expanding — and not only that, but the its expansion is accelerating. To explain this phenomenon, we invoke what’s known as dark energy — an unknown form of energy that exists everywhere and exerts a negative pressure, driving the expansion. Since this idea was first proposed, we’ve conducted decades of research to better understand what dark energy is, how much of it there is, and how it influences our universe.

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