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  2. Kola Superdeep Borehole - Wikipedia

    en.wikipedia.org/wiki/Kola_Superdeep_Borehole

    The Kola Superdeep Borehole SG-3 (Russian: Кольская сверхглубокая скважина СГ-3, romanized: Kol'skaya sverkhglubokaya skvazhina SG-3) is the deepest human-made hole on Earth (since 1979), which attained maximum true vertical depth of 12,262 metres (40,230 ft; 7.619 mi) in 1989. [1]

  3. Sagittarius A* - Wikipedia

    en.wikipedia.org/wiki/Sagittarius_A*

    Sagittarius A*, abbreviated as Sgr A* (/ ˈ s æ dʒ ˈ eɪ s t ɑːr / SADGE-AY-star [3]), is the supermassive black hole [4] [5] [6] at the Galactic Center of the Milky Way.Viewed from Earth, it is located near the border of the constellations Sagittarius and Scorpius, about 5.6° south of the ecliptic, [7] visually close to the Butterfly Cluster (M6) and Lambda Scorpii.

  4. Sagittarius A - Wikipedia

    en.wikipedia.org/wiki/Sagittarius_A

    The supermassive black hole Sagittarius A*, imaged by the Event Horizon Telescope [8] Astronomers now have evidence that there is a supermassive black hole at the center of the galaxy. [9] Sagittarius A* (abbreviated Sgr A*) is agreed to be the most plausible candidate for the location of this supermassive black hole.

  5. Big Hole - Wikipedia

    en.wikipedia.org/wiki/Big_Hole

    The Big Hole has a surface of 17 hectares (42 acres) and is 463 metres (1,519 ft) wide. It was excavated to a depth of 240 metres (790 ft), but then partially infilled with debris reducing its depth to about 215 metres (705 ft). Since then it has accumulated about 40 metres (130 ft) of water, leaving 175 metres (574 ft) of the hole visible.

  6. Black Hole Size Comparison Chart Gives New View of Universe

    www.aol.com/news/black-hole-size-comparison...

    The post Black Hole Size Comparison Chart Gives New View of Universe appeared first on Nerdist. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: 800-290 ...

  7. A giant hole in Siberia is visible from space and growing ...

    www.aol.com/giant-hole-siberia-visible-space...

    A giant hole in the earth is breaking open the land in Siberia, ... researchers used satellite and drone data to construct 3D models of the megaslump and calculate its expansion over time.

  8. 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.

  9. Hole in the Earth's ozone layer Is finally closing up, NASA says

    www.aol.com/article/2015/05/15/hole-in-the-earth...

    The Weather Channel A hole in our atmosphere more than twice the size of the United States is finally beginning to close up, and might even be completely gone by the end of the century, according ...