Using the Lulin One-meter Telescope (LOT), astronomers have observed a newly detected candidate ultra-faint dwarf galaxy known as Virgo III. As a result, they discovered three new RR Lyrae variable ...

RR Lyrae, an old yellow giant star 850 light-years distant in northwest Lyra, near the border of Cygnus, is the prototype of one of the most important classes of pulsating variable stars. RR ...

Variable stars, notably Cepheids and RR Lyrae, pulsate due to cyclic ionisation of helium in their envelopes, driving periodic expansions and contractions. These pulsation dynamics trace stellar ...