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AHEAD2020

  • Home
  • About AHEAD2020
  • Open days
    • National Observatory of Athens (Penteli)
    • National Observatory of Athens (Thissio)
  • Events
  • Videos
    • AHEAD
      • Virtual Reality videos
        • The Hot and Energetic Universe – Virtual Reality (VR) edition
        • The X ray Universe – Virtual Reality (VR) edition
      • Hot and Energetic Universe – El Universo caliente y energético (Spanish Narration)
      • The Hot and Energetic Universe (flat version, HDTV)
      • The Hot and Energetic Universe (short version)
      • Short version of “The Hot and Energetic Universe” (Greek narration and subs)
      • The Hot and Energetic Universe (version for DOME theatres)
      • Black Holes
      • Gamma Ray Bursts
      • Gamma ray astronomy
      • Why Observe from Space
      • AHEAD advertising video
      • AHEAD video for National Observatory of Athens
    • NOA
      • NOA
    • Documentaries
    • Public Lectures
    • HEASARC
      • ESO
    • ESA
  • Images
    • HEASARC
    • ESO
    • APOD
    • HEAPOW
  • Educational
    • Booklet for Dome Video (ESO website)
    • Booklet for Dome Video
    • Guide for visitors (Dome Video)
    • Posters
      • About AHEAD
      • The Hot and Energetic Universe
      • The Hot and Energetic Universe (full version, ~300MB)
      • Black Holes and Supernovae
      • Black Holes and Supernovae (full version, ~300MB)
      • AGN
      • AGN (full version, ~2MB)
      • Gravity
      • Gravity (full version, ~2MB)
      • X-ray Observations/Surveys
      • X-ray Observations/Surveys (full version, 2MB)
    • Below age of 14
      • Star child (NASA)
      • ESA kids (ESA)
      • Presentations
    • Above age of 14
      • Imagine
      • XMM learning centre
      • SWIFT learning centre
      • RXTE learning centre
      • Fermi education centre
      • A brief History of High Energy Astronomy (NASA)
      • ESA education (ESA)
    • Advanced
      • Astronomy exercises (ESA/ESO)
      • Hubble Public Lectures (NASA)
  • Links
    • AHEAD main site (INAF)
    • Public Outreach
      • The Athena X-ray Observatory
      • European Gravitational Observatory (EGO)
      • 3XMM
      • ESA
      • ESO/ePOD
      • ESO-Press Release
      • HEASARC
      • WebStars
      • Ask an astrophycist
      • Cosmic Distances
      • AstronomyNow
    • Missions
      • INTEGRAL
      • XMM-NEWTON
      • AstroSat
      • Swift
      • Chandra
      • AGILE
      • ATHENA
  • Press
    • The Hot and Energetic Universe: A planetarium movie
    • Scientists invited to take advantage of leading high energy research centres
    • INAF Press Release: X-ray bombardment
    • AHEAD’s planetarium movie wins the international fulldome film competition
      • INAF Press Release
      • NOA Press Release
      • LU Press Release
    • Scientists assemble to discuss the power of X-ray spectroscopy
    • Researchers’ Night 2017
      • INAF Rome Press Release
      • NOA Press Release
    • Press release for ATHENA
      • NOA press release
      • INAF Rome press release
    • Press release from the AHEAD Multi-messenger workshop in Alicante
  • Social media

Category: Image

Star evolution

April 27, 2022April 27, 2022 Ektoras PouliasisImage

By combining our two major theories, that of the very large, General Relativity, and that of the very small, Quantum Physics (in particular nuclear and particle physics), it has been possible to construct a relatively accurate description of the life Read More …

Three views of the UNIVERSE!

April 14, 2022April 14, 2022 Ektoras PouliasisImage

The discourse on the cosmos, emerging from humans’ interest in the sky and the constellations, was further developed through the ancient Greek philosophies of Nature. During the Renaissance, the geometric and dynamic astronomy of Galileo and Newton was established, wherein Read More …

R Aquarii: The dance of a red giant and a white dwarf!

March 22, 2022March 22, 2022 Ektoras PouliasisImage

R Aquarii is a pair of a) a white dwarf star that steadily burns at a relatively cool temperature and b) a highly variable red giant. As they orbit each other, the white dwarf pulls material from the red giant Read More …

Eta Carinae: Visualization Explores A Massive Star’s Great Eruption

February 10, 2022January 28, 2022 Ektoras PouliasisImage

The three-dimensional visualization of Eta Carinae, a massive star that had an enormous eruption observed in the 1840s, is based upon multiwavelength data from Chandra, Hubble, and Spitzer. Data from each set of different wavelengths of light reveal different structures Read More …

Evolution of imaging a Black Hole!

February 9, 2022January 28, 2022 Ektoras PouliasisImage

The world’s very first simulation of a black hole 40 years earlier by Jean-Pierre Luminet, a young researcher at the CNRS at that time, published in 1979 in Astronomy and Astrophysics. It is not an artist’s view but an image Read More …

The planetary nebula NGC3242 as seen in X-rays!

January 5, 2022December 20, 2021 Ektoras PouliasisImage

😉 NGC3242, a planetary #nebula, that have been observed both by @Chandra X-ray Observatory (X-rays in magenta colour) and Hubble Space Telescope (optical in red, green & blue colours) space telescopes. 📖 #Planetary nebulas are a phase that #stars like Read More …

The planetary nebula NGC7027 as seen in X-rays!

December 29, 2021December 20, 2021 Ektoras PouliasisImage

NGC7027, a planetary nebula, that have been observed both by Chandra (X-rays in magenta colour) and Hubble (optical in red, green & blue colours) space telescopes. Planetary nebulas are a phase that stars like the Sun undergo after they run Read More …

The planetary nebula NGC6302 as seen in X-rays!

December 22, 2021December 20, 2021 Ektoras PouliasisImage

NGC6302, a planetary nebula, that have been observed both by Chandra (X-rays in magenta colour) and Hubble (optical in red, green & blue colours) space telescopes. Planetary nebulas are a phase that stars like the Sun undergo after they run Read More …

Pandora’s Cluster

November 2, 2021November 2, 2021 Ektoras PouliasisImage

Galaxy clusters are the largest objects in the universe held together by gravity. They typically contain hundreds of galaxies (stars, gas and dust), spread over a region of whose size is roughly 1025 cm. Their total masses exceed 1048 gm. Read More …

Centaurus A: Multi-wavelength image

May 16, 2021May 16, 2021 Ektoras PouliasisImage

When matter from the galaxies starts to accrete into super massive black holes, an enormous amount of energy is released across the whole electromagnetic spectrum (from radio emission up to X- and γ- rays). This constitutes the characteristic signature of Read More …

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AHEAD2020 videos

X-ray talks

Upcoming Events

  1. Ten Years of High-Energy Universe in Focus: NuSTAR 2022 — Cagliari, Italy – June 20–22, 2022

    June 20 - June 22
  2. COSPAR 2022 – 44th Scientific Assembly in Athens – 16-24 July 2022

    July 16 - July 24
  3. Workshop: “What drives the growth of black holes: a decade of reflection” in Reykjavik, Iceland, 26th-30th September 2022

    September 26 @ 8:00 am - September 30 @ 5:00 pm
  4. Exploring the Hot and Energetic Universe: third’s Athena scientific conference, 7-10 November 2022 in Barcelona

    November 7

View All Events

Are you ready to explore the X-ray Universe?

Welcome to CLAXSON!

(Classification of X-ray Sources for Novices)

Now available in EN, FR, ES and GR!

CLAXSON is a platform that trains you to identify new objects observed in the X-ray sky with the European Space Agency X-ray telescope XMM-Newton. Be the first to find new supermassive black holes, stars, galaxies and other exotic objects in observations taken over the last 20 years, and help astronomers unravel the mysteries of the X-ray sky.

Invitation to submit news

Astronomers are invited to advertise their work and/or recent results in our website. Publications/news related to High Energy Astrophysics are of particular interest.

A brief text along with a related image should be sent to the following email addresses:
epouliasis@noa.gr
igeorgantopoulos@gmail.com

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