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2. List of most massive black holes - Wikipedia

   en.wikipedia.org/wiki/List_of_most_massive_black...

   The supermassive black hole at the core of Messier 87, here shown by an image by the Event Horizon Telescope, is among the black holes in this list.. This is an ordered list of the most massive black holes so far discovered (and probable candidates), measured in units of solar masses (M ☉), approximately 2 × 10 30 kilograms.

3. Event Horizon Telescope - Wikipedia

   en.wikipedia.org/wiki/Event_Horizon_Telescope

   The Event Horizon Telescope (EHT) is a telescope array consisting of a global network of radio telescopes.The EHT project combines data from several very-long-baseline interferometry (VLBI) stations around Earth, which form a combined array with an angular resolution sufficient to observe objects the size of a supermassive black hole's event horizon.

4. Pinhole glasses - Wikipedia

   en.wikipedia.org/wiki/Pinhole_glasses

   Pinhole glasses, also known as stenopeic glasses, are eyeglasses with a series of pinhole-sized perforations filling an opaque sheet of plastic in place of each lens. Similar to the workings of a pinhole camera , each perforation allows only a very narrow beam of light to enter the eye which reduces the size of the circle of confusion on the ...

5. Very Large Array - Wikipedia

   en.wikipedia.org/wiki/Very_Large_Array

   The Karl G. Jansky Very Large Array (VLA) is a centimeter-wavelength radio astronomy observatory in the southwestern United States built in the 1970s. It lies in central New Mexico on the Plains of San Agustin , between the towns of Magdalena and Datil , approximately 50 miles (80 km) west of Socorro .

6. Binoculars - Wikipedia

   en.wikipedia.org/wiki/Binoculars

   Binoculars or field glasses are two refracting telescopes mounted side-by-side and aligned to point in the same direction, allowing the viewer to use both eyes (binocular vision) when viewing distant objects. Most binoculars are sized to be held using both hands, although sizes vary widely from opera glasses to large pedestal-mounted military ...

7. What Is Coloboma? All About Madeleine McCann’s Rare Eye Condition

   www.aol.com/coloboma-madeleine-mccann-rare-eye...

   Low vision aids like telescopic glasses or lenses that filter light An eye patch or eye drops (in young children) "If there’s a coloboma of the eyelid, you can have surgery to repair that," Dr ...