Star of the day

One star a day keeps astropassion awake. - Handmade (well, thumbmade), crafted tweets to bring you the spectacular richness of our Sun's siblings. By @mtrevix

[Star of the day @OneStarADay]

Skat (δ Aqr)

A lone cyan star in #Aquarius that has probably the same origin as the Ursa Major Moving Group, perhaps in an open cluster

[Star of the day @OneStarADay]

Pi Andromedae (π And)

A spectroscopic binary (so close, only the spectrum gives us a hint about its duplicity) of blue stars in #Andromeda

[Star of the day @OneStarADay]

Eta Ceti (η Cet)

An orange giant in #Cetus, an "almost Zodiacal" constellation, as the ecliptic is so close it often hosts Moon and planets

[Star of the day @OneStarADay]

Kappa Ophiuchi (κ Oph)

An orange giant in #Ophiuchus, the Snake Bearer. Compare to nearby cerulean Iota Ophiuchi. Isn't it a nice contrast?

[Star of the day @OneStarADay]

Kaus Australis (ε Sgr)

The Teapot, #Sagittarius, is one of those famous asterisms everyone should recognise.This azure beauty is part of it

[Star of the day @OneStarADay]

Salm (τ Peg)

A star with the colour of Vega, making nice, but unrelated, couple with Upsilon Pegasi within the Square of #Pegasus

[Star of the day @OneStarADay]

Cleeia (δ3 Tau)

Happy 144th birthday, Ejnar Hertzsprung! Co-developer of HR diagrams, started using Hyades stars in #Taurus, as this one

[Star of the day @OneStarADay]

HD 49878 (Cam)

Behind this unattractive name hides a nice orange giant in #Camelopardalis, one of the constellations created by Plancius

[Star of the day @OneStarADay]

Deneb Algedi (δ Cap)

An interesting whitish star in #Capricornus. Eclipsed ~every day by a dimmer companion star, and sometimes by our Moon

[Star of the day @OneStarADay]

15 Lyncis (15 Lyn)

A couple of dim stars in the darkish region of sky defined as #Lynx by the mayor of Danzig (Polish astronomer Hevelius)

[Star of the day @OneStarADay]

Alula Borealis (ν UMa)

An orange giant in one of the three leaps of the gazelle, in #UrsaMajor. Enjoying the company of a Sun-like friend

[Star of the day @OneStarADay]

44 Boötis (44 Boo)

A triple star in #Boötes, the inner pair so close, that might touch each other. They could be called "the kissing stars"

[Star of the day @OneStarADay]

Polaris (α UMi)

One of the most famous stars, a multiple system in #UrsaMinor, seemingly static in the sky as everything else is turning

[Star of the day @OneStarADay]

Zubenhakrabi (σ Lib)

A red giant in #Libra in the last stages of life. Formerly considered part of Scorpius (and designated Gamma Scorpii)

[Star of the day @OneStarADay]

Sargas (θ Sco)

A yellow bright giant with a companion in #Scorpius, to admire with a myriad of dimmer stars on the shore of the Milky Way

[Star of the day @OneStarADay]

Rho Aquilae (ρ Aql)

"Fixed stars" are not fixed, they all move. Some even change constellation. As this star, in #Delphinus since the 1990s

[Star of the day @OneStarADay]

Phi Andromedae (φ And)

A close binary (too close for most telescopes): two blue, main sequence stars in one of the legs of #Andromeda

[Star of the day @OneStarADay]

Téng Shé sān (π2 Cyg)

A triple star dominated by a blue giant in #Cygnus, with no occidental name. A good reference to the open cluster M39

[Star of the day @OneStarADay]

Phi Draconis (φ Dra)

Described as a "nice mess" by Jim Kaler, this star system in #Draco is dominated by an α2 Canum Venaticorum variable

[Star of the day @OneStarADay]

Sarin (δ Her)

Most single light dots in the night sky hide companions in their glow: today's pale blue star in #Hercules may have upto four