Discovering Sagittarius A*

Chapter 1

The invisible anchor at the center

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Chapter 2

Taking the first picture of a monster

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Chapter 3

Extreme physics in the danger zone

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Chapter 4

The past and future of our black hole

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YOUR GOAL

Master of Discovering Sagittarius A*

Ch 1 · The invisible anchor at the center

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teacher Weighing an invisible stellar shadow

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Fun Fact

Sgr A* name: The asterisk in Sagittarius A* was inspired by chemistry, where an asterisk denotes an excited atom.

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teacher Tracking the stars that dance in the dark

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Quiz

Which star was tracked for decades to prove Sagittarius A*'s gravity?

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Gossip

If you could safely visit Sagittarius A*, would you go?

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Quiz

Who co-discovered the radio source Sagittarius A* in 1974?

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Quiz

What does the asterisk (*) in the name Sagittarius A* represent?

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Quiz

In which constellation does the center of our galaxy lie?

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Quiz

How many times heavier than our Sun is Sagittarius A*?

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Quiz

What percentage of the speed of light does the star S-2 reach at its closest approach to Sagittarius A*?

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Quiz

The diameter of Sagittarius A* would easily fit inside the orbit of which planet?

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Quiz

For what discovery did Andrea Ghez and Reinhard Genzel win the 2020 Nobel Prize in Physics?

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