Mira is the famous pulsating variable star in the constellation Cetus the Whale. In fact, it is the first pulsating variable star ever discovered and hence pulsating variable stars are called Mira Variable stars.
Mira doesn’t just twinkle or subtly change brightness. It dramatically fades and brightens over time, enough so that its visibility changes from being an easy naked-eye star to something you need binoculars or a telescope to see. In fact, its name Mira literally means “the wonderful”, and it was named that by Polish astronomer Johannes Hevelius because of its wonderful or astonishing behavior.
Mira is an unstable red giant star or one that physically contracts and expands in size, causing its brightness to vary cyclically, typically between 80 and 1,000 days and Mira changes in brightness every 332 days. At its brightest, Mira can reach about magnitude 2, easily visible from a dark sky. But near minimum, it can fade to around magnitude 9 or 10, when you would need at least a 60mm telescope or binoculars to see it.
What’s happening here is not an eclipse of one star by another nearby star like what happens to Algol: Mira is actually physically expanding and contracting. As the star expands, its surface cools and dims. When it contracts, it heats up and brightens again. This rhythmic pulsing causes huge changes in brightness, making Mira one of the most dramatic variable stars visible to amateur astronomers.
On February 7, 2026, Mira will reach maximum brightness and so right now is a great time to go outside and look at this wonderful star. To find Mira face south after darkness falls and look first for the Pleiades star cluster and nearby Aldebaran, the orange star marking the eye of Taurus the Bull. The Pleiades and Aldebaran will point downward in a long triangle to Menkar or Alpha (α) Ceti, which is about two outstretched fists (20° to 25°) to the southwest. Mira will be 13° southwest of Menkar on a line through Delta (δ) Ceti, a magnitude 4.1 star. Menkar and nearby Gamma (γ) Ceti, magnitude 3.5, which is a little north of Delta, make excellent comparison stars for gauging the Mira’s current brightness. Mira will be in a relatively sparse region of sky, which actually makes it easier to identify when it’s near maximum brightness. During brighter phases, you can often spot it just by comparing it to nearby stars of known magnitude like Gamma Ceti.
Binoculars are a great way to observe Mira, especially as it fades. A small telescope will reveal its deep orange-red color, a hallmark of cool red giant stars. Even at higher magnification, Mira remains stellar in appearance. Mira is about 300 light-years from Earth and spans approximately 400 times the radius of the Sun, so knowing that you’re looking at a star that’s hundreds of times larger than the Sun will make looking at this wonderful star contextual and weighty.
One of the most fascinating things about Mira is its history. In 1596, astronomer David Fabricius recorded Mira as a new star. When it later vanished from view, it caused confusion—was it a nova? A supernova? Was it related somehow to Jupiter? It wasn’t until decades later that astronomers realized Mira was a pulsating variable star, becoming the first star of its kind ever identified.
Mira also has a companion star, forming a binary system, and the interaction between the two has produced an enormous tail of material trailing through space—evidence of the star shedding mass as it nears the end of its life. This is a glimpse into the future of Sun-like stars, including our own, billions of years from now.
What makes Mira especially rewarding is that you don’t just observe it once—you follow it. By checking in on Mira over weeks and months, you’re watching stellar evolution unfold in real time. Very few stars change in a way that’s so obvious on a human timescale.
So, if you’re looking for a target that connects patience, history, and astrophysics, Mira is an outstanding object to observe; you don’t need to go to a dark sky site and you don’t need a big aperture telescope; looking at Mira is about witnessing a star breathe. And another fun thing to do is to track Mira’s brightness over time in your observing log.
Dark skies forever—and keep watching the stars change.
