Where does this come from, and can I check it?

Sagittarius A star was imaged by the Event Horizon Telescope in 2022. The figure is taken from Event Horizon Telescope, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

Is this really a space fact?

Yes. It sits on the Space shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.

What else can I read about it?

The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.

Mondo Knows Facts

The Milky Way's black hole is four million solar masses

Sagittarius A star was imaged by the Event Horizon Telescope in 2022 Astronomers tracked stars orbiting an unseen mass at the galactic centre for decades. Radio dishes across the planet then combined into one virtual telescope to image the glow around it. The image took five years of processing. It sits in Mondo's space collection, one of 200 facts that each trace back to the reference below.

Where this comes from

Event Horizon Telescope

Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.

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Space & Astronomy trivia

More facts like this

Sun-synchronous orbits keep the same local timeThese near-polar paths precess to match the Sun's apparent yearly motion ALMA photographed a planet's birth diskThe 2014 image of HL Tauri showed rings and gaps carved in dust Landsat has photographed Earth since 1972Its sensors record several wavelength bands at once, so vegetation, water and rock can be told apart from orbit Galaxy clusters act as magnifying lensesTheir gravity bends light from objects behind them into arcs Splitting starlight reveals what a star is made ofEach element leaves dark lines at fixed wavelengths Almost every galaxy is moving away from usTheir light is stretched toward red, and the further the galaxy the faster it recedes

Tags: black-holes, galaxy, imaging

The Milky Way's black hole is four million solar masses: the short answers

Where does this come from, and can I check it?: Sagittarius A star was imaged by the Event Horizon Telescope in 2022. The figure is taken from Event Horizon Telescope, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a space fact?: Yes. It sits on the Space shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.