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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

Author: Dr. George Mountrichas

The outburst of the black hole V404 Cygni

March 18, 2016March 18, 2016 Dr. George MountrichasArticle

In June 2015, the black hole V404 Cygni showed the most luminous outburst of recent years.

A mysterious X-ray source in the Galactic Center

March 11, 2016March 11, 2016 Dr. George MountrichasArticle

Astronomers used new observations from NuStar and XMM-Newton satellites to reveal the nature of a mysterious X-ray source, located in the Galactic Center region.

Be the next one to detect gravitational waves.

March 11, 2016March 11, 2016 Dr. George MountrichasArticle

The project Einstein@home gives everyone the opportunity to detect a gravitational wave.

The most distant galaxy ever observed

March 4, 2016March 4, 2016 Dr. George MountrichasArticle

Astronomers used the Hubble Space Telescope to determine the distance of the farthest galaxy that has ever been observed. The galaxy existed only 400 million years after the Big Band, when the Dark Ages of the Universe were just ending and before the cosmic reionization era start. This means that it belongs to the very first galaxies that formed.

Can the death of one star give birth to two black holes?

February 26, 2016February 26, 2016 Dr. George MountrichasArticle

A recent paper by astrophysicist Avi Loeb, of the Harvard-Smithsonian Center for Astrophysics, claims that two black holes can form out of the same dying star.

Discovery of an X-ray jet from a distant black hole

February 26, 2016 Dr. George MountrichasArticle

Astronomers discovered an X-ray jet that was emitted from a quasar when the universe was only 2.7 billion years old, using the Chandra X-ray Observatory. The length of the jet is at least 300,000 light years.

The most sensitive X-ray satellite was launched

February 19, 2016February 19, 2016 Dr. George MountrichasArticle

On February 17th the X-ray satellite ASTRO-H was launched from the Tahegashima Space Centre. ASTRO-H is capable of observing with unprecedented accuracy the physical mechanisms produced by high-energy phenomena, like supernova explosions and black holes.

Implications of the detection of gravitational waves: A new era of astrophysics

February 19, 2016February 20, 2016 Dr. George MountrichasArticle

Last week astronomers announced the first ever detection of gravitational waves. This detection not only confirms Einstein’s theory of general relativity, but also has implications that affect both the observational and theoretical astrophysics.

The first ever detection of gravitational waves

February 12, 2016February 12, 2016 Dr. George MountrichasArticle

The first ever direct detection of gravitational waves was announced on 11th of February. Gravitational waves are ripples in space-time that occur under certain circumstances, for example when two very compact celestial objects like neutron stars or black holes merge. The detection was made about a century after Albert Einstein predicted their existence.

Gamma Ray Bursts: The most energetic explosions of gamma rays in the universe

February 10, 2016February 10, 2016 Dr. George MountrichasArticle

Gamma Ray Bursts (GRBs) are extremely energetic explosions of gamma rays and the brightest electromagnetic events known in the universe. Our knowledge on this astonishing astrophysical phenomenon has greatly evolved in recent years.

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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.

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