Picture Of A Black Hole

by Daniel Brouse

You can not really take a picture of a black hole. No light escapes from a black hole, so you won’t see anything. That is why it is called a black hole; however, theoretical astronomers have attempted to take the first picture. Instead, they try to piece together an image of a black hole’s “event horizon”. An event horizon is a term from general relativity that describes a boundary in spacetime. What is beyond the event horizon cannot affect an outside observer (the shell of “points of no return” at which the gravitational pull becomes so great as to make escape impossible including light.)

The event horizon allows you to see the shadow from a black hole. The Event Horizon Telescope links telescopes from around the world to create one Earth-sized telescope.

Vincent Fish, a research scientists at MIT, said, “What we expect to see is an asymmetric image where you have a circular dark region. That’s the black hole shadow. And there might be a bright ring at the edge of that—which is the photon ring [a spherical region of space where gravity is so strong photons are forced to travel in orbits]. Then around it you will see one side is bright and the other side is faint, so kind of like a crescent.

The reason for the crescent is that material near the black hole is moving at a few tenths of the speed of light. Special relativity tells you when particles emit photons—when they shine light at you—if the particles are moving towards you, it looks very bright, if they’re moving away from you, then it gets very dim. That produces this asymmetry.”

The Event Horizon Telescope will allow for the first time an image with high enough resolution to show the event horizon from a black hole. In early April 2017, astronomers took five days worth of images. It will take several months before the images can be pieced together to form “a picture of a black hole”.

The Membrane Domain Science Center

This entry was posted in Science, Space and tagged , , . Bookmark the permalink. Both comments and trackbacks are currently closed.
  • RSS The Membrane Domain

    • Pollution And Health: 9 Million Deaths Per Year
      The Lancet Commission published a report on October 19, 2017 that outlined the results of pollution and health. The report concluded that 9 million people suffered premature deaths due to pollution in 2015. “Pollution is the largest environmental cause of disease and premature death in the world today. Diseases caused by pollution were responsible for […]
    • Senegal Forecasts Climate Change Changes
      Senegal is an African country on the west coast of the continent. The country is on the forefront of global warming’s impacts. “Climate change makes life harder for Senegalese farmers in many different ways: shorter rainy seasons, more frequent and longer dry spells and droughts, a lower water table, floods, coastal erosion, destruction of mangroves, […]
    • How to Make Gold & Platinum
      by Daniel Brouse Q: How do you make gold and platinum? A: Collide two neutron stars “It’s so beautiful. It’s so beautiful it makes me want to cry. It’s the fulfillment of dozens, hundreds, thousands of people’s efforts, but it’s also the fulfillment of an idea suddenly becoming real,” said Peter Saulson of Syracuse University. […]
  • A song about ride sharing:
    youtu.be/Z1LF5nlb3eo
    ...

    View on Facebook

    John Hannafin studio / Greater West Chester Chamber of Commerce's Fall Gallery Walk ...

    @[1151298906:2048:John Hannafin] studio / @[1965733113668798:844:Greater West Chester Chamber of Commerce's Fall Gallery Walk]

    View on Facebook
  • RSS PhilaNet.com

    • 18th Annual FIRST Robotics Competition
      High School Robotics Teams Battle it out in Arena-Style Competition November 4, 2017, 8:00 AM – 5:00 PM Wissahickon High School Gymnasium 521 Houston Road, Ambler, PA 19002 Ramp Riot is Team 341’s annual off-season event. With its humble roots as an 8 team scrimmage back in 2000, Ramp Riot now draws 36 teams and […]
    • Roxborough Manayunk Wissahickon Historical Society
      Society Meeting and Guest Speaker Schedule Presented by Roxborough Manayunk Wissahickon Historical Society Events are free to the public. Wednesday, October 25th To be held at: Journey’s Way 403 Rector Street Philadelphia, PA 19128 @ 7 PM Guest Speakers — Jerry Francis, Ann Bagley & Sylvia Myers – Belmont Hills (aka West Manayunk) – a […]
  • RSS NASA Image Of The Day

    • The Grace of Saturn
      Saturn's graceful lanes of orbiting ice -- its iconic rings -- wind their way around the planet to pass beyond the horizon in this view from NASA's Cassini spacecraft.
  • RSS Natural Disasters

    • Typhoon Lan
      The storm was expected to intensify significantly and might make landfall on the Japanese mainland.
  • Categories

  • Archives

Created by: Daniel Brouse and Sidd
All text, sights and sounds © BROUSE
"You must not steal nor lie nor defraud."