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Bad Astronomy | A sextuple star system where all six stars undergo eclipses

Multiple stars are just intrinsically cool: Unlike our Sun, sailing alone through space, multiples are where two or more stars orbit each other in a stable, gravitationally bound system. Half the stars in the galaxy are in multiple systems like that. Most are binaries (two stars orbiting each other) and some in trinaries (three stars). Fewer yet are in higher-order systems.
That's the first thing that makes TYC 7037-89-1 special: It's a sextuplet, a six-star system. It's a little over 1,900 light years away, so a fair distance, but it's bright enough to be detected by TESS, the Transiting Exoplanet Survey Satellite. TESS scans the sky measuring the brightnesses of stars to look for transiting exoplanets, which make mini-eclipses on their host stars, revealing their presence.

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Black hole 'Old Faithful' caught ripping up a star – 'Never seen something like this' | Science | News

| UPDATED: 20:48, Wed, Jan 13, 2021
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Data derived from space agency NASA's Neil Gehrels Swift Observatory and Transiting Exoplanet Survey Satellite (TESS), has allowed black hole researchers to examine the reliably repeated outbursts of an event dubbed ASASSN-14ko. This involves the violent eruption of light predictably flashing roughly every 114 days.

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