The Event Horizon Telescope Update 02/19/17 | Summary and Q&A

TL;DR

A new telescope, the Event Horizon Telescope, aims to capture the first-ever photograph of a black hole, specifically Sagittarius A at the center of our Milky Way galaxy.

Key Insights

• 🖤 Black holes remain enigmatic and understanding their true nature requires direct observation.
• ◾ Sagittarius A, the supermassive black hole at the center of the Milky Way, is believed to have a small diameter event horizon.
• 😒 The Event Horizon Telescope's use of Very Long Baseline Interferometry promises unprecedented resolution.
• ❓ If successful, the photograph would validate or challenge Einstein's General Theory of Relativity.
• 🖤 The captured image would reveal the appearance of a black hole for the first time, featuring a black dot surrounded by a glowing accretion disk.
• 🖤 The photograph would provide valuable insights into the behavior of matter and gravitational dynamics near black holes.
• 💖 The black hole's appearance may differ from previous theories, potentially sparking new discoveries and challenges in astrophysics.

Transcript

One of the strangest and most mysterious phenomena in science today is the black hole. So strange in fact that once you go through one, which would most certainly kill you, you will have left our universe entirely and entered some place else that can only be described as ambiguous at best. It's a place where the laws of physics as we know them brea... Read More

Questions & Answers

Q: How can black holes be described based on our current understanding?

Black holes are regions in space where gravity is so strong that nothing, including light, can escape. They are thought to have a singularity at their core and an event horizon, beyond which nothing can be observed or communicated.

Q: What is the significance of photographing a black hole?

Photographing a black hole would confirm existing theories, provide insights into the behavior of matter under extreme conditions, and potentially challenge our understanding of physics if its appearance differs from predictions.

Q: Why has it been challenging to photograph black holes?

Black holes swallow light, making them impossible to directly photograph. Additionally, their small size and distance from Earth, along with obscuration by dust and gas, further complicate the process.

Q: What technique will the Event Horizon Telescope use to photograph Sagittarius A?

The telescope will employ Very Long Baseline Interferometry, which combines data from a network of radio telescopes to achieve high resolution and capture the black hole's radio emissions at a wavelength of 1.3 mm.

Summary & Key Takeaways

• Black holes, the strangest and most mysterious phenomena in science, pose challenges in understanding their true nature and appearance.

• Sagittarius A, the supermassive black hole at the center of our galaxy, has never been directly photographed, but it is theorized to appear as a black dot with a glowing accretion disk.

• The Event Horizon Telescope, a network of radio telescopes using Very Long Baseline Interferometry, will attempt to capture the black hole's shadow superimposed over its accretion disk in April.