Testing general relativity The no-hair theorem of general relativity predicts that the spacetime around a black hole can be expressed in terms of only three parameters: the black hole mass, spin, and charge. Since it is hard to see how a real...
"Aiming to make the first portrait of the hungry monster at the center of our galaxy, astronomers built 'a telescope as big as the world.'" Black Hole Hunters by Dennis Overbye for The New York Times
The Schwarzschild radius for Sgr A* is 10 microarcseconds, an exceedingly small size even by astronomical standards. EHT observations to date have achieved an a resolution of better than 60 microarcseconds -- about the angular size of an orange on the...
Motivation EHT observations of Sgr A* and M87 to date have been carried out at 230 GHz (1.3 mm wavelength). We expect to add 345 GHz (0.87 mm) as an observing frequency in the near future. The effort to extend millimeter VLBI observations to higher...
In honor of Space Exploration Day, commemorating the Apollo 11 moon landing on July 20, 1969, Event Horizon Telescope scientists share what inspires them about space exploration and observation. * * * For all of humanity, life begins as a profound voyage...
It is an exciting time in the Event Horizon Telescope (EHT) project. After many years of preparation, our team mounted a week-long observing campaign in April of this year that linked together 8 telescopes in Hawaii, the South Pole, Arizona, Spain, Mexico...
Most of the data collected in April 2017 EHT global campaign have now been through a first stage of processing at the MIT Haystack Observatory (Cambridge, MA, USA) and the Max Planck Institute for Radio Astronomy (MPIfR; Bonn, Germany). Computing clusters...
The April 2017 Observations gallery has just been updated with new photos from the South Pole Telescope. These photos bring you inside the reciever cabin, outside on the telescope in temperature of -60 degrees Celsius, and under an Antarctic night sky...
