Betelgeuse is a red supergiant star visible to sky watchers in the "shoulder" of the constellation of Orion, the Hunter. In late 2019 Betelgeuse began to undergo a surprising "dimming" event before recovering its typical brightness several months later. In this two-part podcast, hear how astronomers have been using observations at radio wavelengths, combined with data from other telescopes, to uncover the cause of this historic dimming event, and what it means for the future evolution of this star.
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Betelgeuse is a red supergiant star visible to sky watchers in the "shoulder" of the constellation of Orion, the Hunter. In late 2019 Betelgeuse began to undergo a surprising "dimming" event before recovering its typical brightness several months later. In this two-part podcast, hear how astronomers have been using observations at radio wavelengths, combined with data from other telescopes, to uncover the cause of this historic dimming event, and what it means for the future evolution of this star.
Even with the most powerful optical telescopes, the closest stars
beyond the Sun generally appear as mere pinpoints of light, leaving us to only imagine what their light-emitting surfaces or "photospheres" might look like. However, using a technique
known as radio interferometry, astronomers are now able to glimpse
the faces of certain types of stars known as asymptotic giant
branch stars (or "AGB stars" for short). What's more, the
appearances of these AGB stars are seen to change over time.
In this podcast, hear how astronomers are using radio
interferometry to gain fascinating insights into what the future has in store for stars like the Sun as they reach old age.
Radio Stars
Betelgeuse is a red supergiant star visible to sky watchers in the "shoulder" of the constellation of Orion, the Hunter. In late 2019 Betelgeuse began to undergo a surprising "dimming" event before recovering its typical brightness several months later. In this two-part podcast, hear how astronomers have been using observations at radio wavelengths, combined with data from other telescopes, to uncover the cause of this historic dimming event, and what it means for the future evolution of this star.
