Lyra

related topics
{god, call, give}
{math, energy, light}
{specie, animal, plant}
{island, water, area}
{day, year, event}
{album, band, music}
{film, series, show}

Lyra (from Greek λύρα) is a constellation. Its name is Latin for the lyre, a stringed musical instrument used in classical antiquity and later. Lyra was one of the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations recognized by the International Astronomical Union today. Lyra is a small constellation, but its principal star, Vega, is one of the brightest in the sky. Beginning at the north, Lyra is bordered by the Dragon Draco, the Greek hero Hercules, the little fox Vulpecula and Cygnus the swan.[2]

This constellation is visible from the northern hemisphere from spring through autumn, and is nearly overhead during the summer months. From the southern hemisphere, this constellation is visible low in the southern sky during the winter months.

Vega is also part of the asterism known as the Summer Triangle, consisting of the brightest stars in the constellations Lyra, Aquila, and Cygnus.

Contents

Notable features

Stars

Lyra's brightest stars include the following:[2]

  • α Lyr (Vega). With an apparent brightness of 0.03m, this is the second brightest star of the northern hemisphere (after Arcturus) and the fifth brightest star in all; its spectral class is A0 V and it lies at a distance of only 25.3 ly.
  • β Lyr (Sheliak). A group of eclipsing binaries is named after this variable star (3.45m, spectral class B8 II), the Beta-Lyrae-stars.
  • γ Lyr (Sulafat). The main star of this multiple star system is of magnitude 3.24m and spectral class B9 III.
  • δ1 Lyr. A double star consisting of a blue-white star of mag. 6m and a semi-regular red giant.
  • ε Lyr. A well-known quadruple star, also called "the Double Double" because each of the two brighter components is a double star.
  • ζ Lyr. Another double star which can be split using binoculars.
  • RR Lyr lends its name to a class of pulsating variable RR Lyrae-stars.

Full article ▸

related documents
Guardians of the Universe
Oerth
Centaurus
Bṛhaspati
Empusa
Parable of the Pearl
Andraste
Horned Serpent
Igaluk
Mixcoatl
Balius and Xanthus
Boann
Ursula Southeil
Graeae
Angitia
Arcas
Iacchus
Monthu
Telchines
Hlidskjalf
Varda
Annwn
Oduduwa
Hygieia
Shango
Fafnir
Andjety
Juggernaut
Goblin
Esus