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  • The DES Project
    • Overview
    • Science
    • Instrument
    • Survey
    • Collaboration
    • Scientist of the Week
    • For DES Members
  • Results & Papers
    • Publications
    • Y1 Cosmology
    • Y3 Cosmology
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    • Supernovae
    • BAO
    • Press Releases
  • Data Access
    • All Data
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    • Data Release 1
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TheDESurvey @TheDESurvey
Dark Energy Survey  @TheDESurvey
Nov 25
RT @NOIRLabAstro:How did @cerrotololo get its name? In 1962 Cerro Tololo was officially decided to be the location of a new observat… https://t.co/obHHJpzu32
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Dark Energy Survey  @TheDESurvey
Nov 24
RT @NOIRLabAstro:Happy 60th Anniversary to @cerrotololo 🎉 In 1958, Professor Federico Rutllant of the @uchile suggested the idea of… https://t.co/cDBxAuoRG5
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Dark Energy Survey  @TheDESurvey
Nov 19
RT @NOIRLabAstro:On this #LGBTQSTEMDAY, we honor the achievements of our talented staff who take pride in their identity as much as… https://t.co/zJ4y558wBv
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Dark Energy Survey  @TheDESurvey
Nov 03
Check out this excellent interview with DEScientist @jlynnmuir in which she explains many aspects of our studies of… https://t.co/mh6b1iv5xd
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Dark Energy Survey  @TheDESurvey
Nov 01
RT @NOIRLabAstro:We're excited to be the @apod today! This image of the Lobster Nebula was released in September to celebrate the 10… https://t.co/mausoI0JEn
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The Dark Energy Survey
3 days ago
The Dark Energy Survey

Timeline photosHow did Cerro Tololo Inter-American Observatory (CTIO) get its name?

On 23 November 1962, Cerro Tololo was officially decided to be the location of a new observatory that would survey the southern skies. At 2200 meters (7200 feet) above sea level, the mountain proved not only to be the best location for exquisite views of the night sky, but also close enough to large cities and an international airport for convenient travel.

“Tololo” means “at the edge of the abyss” in reference to how the mountain drops sharply away on its northern side. Yet when people mention “Tololo” in Chile, they will understand its connection with astronomy: that the summit has become an important viewing point from which we gaze into another abyss — the vast expanse of the Universe.

Read more: ow.ly/YqTo50LNPzm
Credit: CTIO/NOIRLab/NSF/AURA
#astronomy #sky #universe #history #cerrotololo #telescope ... See MoreSee Less

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The Dark Energy Survey
4 days ago
The Dark Energy Survey

Timeline photosHappy 60th Anniversary to Cerro Tololo Inter-American Observatory (CTIO) ! 🎉 Let’s explore the history of CTIO from the very beginning.

In 1958, Professor Federico Rutllant of the University of Chile suggested the idea of a world-class cooperative observatory in Chile. The southern hemisphere hosts a large neighborhood of celestial objects such as the Magellanic Clouds, the Carina-Centaurus region of the Milky Way, and perhaps even more waiting to be discovered. However, finding a good location that balanced good viewing conditions with convenient transportation proved difficult.

Coordination of the “Chile project” took place immediately with support from the National Science Foundation (NSF) and AURA. Spearheaded by the astronomers at Kitt Peak National Observatory - KPNO in Tucson, Arizona, various surveys from Santiago to the Atacama desert took place. Eventually, the search would lead them to a mountain with the best atmospheric, oceanic, and geographic features. This mountain would later come to house the CTIO many years later.

Read more here: noirlab.edu/public/es/blog/anniversary-ctio/

Credit: CTIO/NOIRLab/NSF/AURA ... See MoreSee Less

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The Dark Energy Survey
1 week ago
The Dark Energy Survey

Timeline photosOn this #LGBTQSTEMDAY, we honor the achievements of our talented staff who take pride in their identity as much as in their hard work. Thank you for continuously advancing astronomy with flying colors! ! 🏳️‍🌈‍💫‍
Credits: Berkeley Lab/KPNO/NOIRLab/NSF/AURA
ow.ly/oUi950LI0Kc
#stem #astronomy #universe #science ... See MoreSee Less

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The Dark Energy Survey
4 weeks ago
The Dark Energy Survey

Check out this excellent interview with DEScientist Jessie Muir! In this podcast interview by the Perimeter Institute, Jessie discusses her research with DES, her science-themed cartoons, and many other aspects of our studies of the Universe.

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Jessie Muir on the mystery of dark energy | Conversations at the Perimeter

conversationsattheperimeter.podbean.com

The universe is expanding faster and faster all the time, and Jessie Muir wants to understand why. Muir is a postdoctoral researcher at Perimeter Institute and a member of the international Dark Energ...
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The Dark Energy Survey
4 weeks ago
The Dark Energy Survey

We're excited to be the Astronomy Picture of the Day (APOD) today! This image of the Lobster Nebula was released in September to celebrate the 10 years of discovery of the 570-megapixel U.S. Department of Energy Dark Energy Camera at Cerro Tololo Inter-American Observatory in Chile, a Program of National Science Foundation (NSF)'s NOIRLab.

Check it out: apod.nasa.gov/apod/ap221101.html

Image credit:
CTIO/NOIRLab/DOE/NSF/AURA
T.A. Rector (University of Alaska Anchorage/NSF’s NOIRLab), J. Miller (Gemini Observatory/NSF’s NOIRLab), M. Zamani & D. de Martin (NSF’s NOIRLab) ... See MoreSee Less

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I will answer the question that Zeilinger did not know how to answer! Question “at 24:02”, from a scientist from The Geneva Observatory: What happens if we send an entangled particle into a Black Hole, do we get information from it? Zeilinger said he is not a specialist in Black Holes, but his naïve idea is: Information cannot be lost forever! Zeilinger was wrong and the question was wrong! The scientist who asked the question from The Geneva Observatory and Zeilinger do not understand Black Holes. “Particles do not exist in Black Holes” Adrian Ferent This means Zeilinger naïve idea is wrong! Zeilinger and the scientists from The Geneva Observatory, do not understand Black Holes and Dark Matter! “The 2017, 2019, 2020 Nobel Prizes in Physics were frauds, because they did not understand Gravitation, Dark Matter and Black Holes” Adrian Ferent www.youtube.com/watch?v=O0sLYBeaaAM

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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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