LACERTA
The dim stars of Lacerta, the Lizard, wind almost invisibly across the center of the picture, lost in the myriad faint ones of the Milky way, which is concentrated to the left (north).
Lacerta
Please hover over any star to get more information
Lacerta is a small, faint constellation in the northern hemisphere. Its name means "lizard" in Latin.
Lacerta
Transit Date of principal star:
29 August
Lacerta, is one of seven constellations introduced by Johannes Hevelius.
Lacerta
Map created in Guide 7.0 with the figure outline based on Johannes Hevelius' Uranographia (1690). Click on the object's name to access its image or click on the name of adjacent constellation to see its map.
Lacerta
Abbreviation: Lac
Genitive: Lacertae
Translation: The Lizard
Peoria Astronomical Society Lacerta Page
Interactive star chart (Java applet) ...
Lacerta, the lizard:
A modern constellation formed in 1687 by the astronomer Johannes Hevelius from stars found between the constellations of Cygnus and Andromeda. It is a small constellation, with no bright stars.
BL Lacertae objects are radio galaxies characterized by rapidly varying luminosity, no emission lines in the spectrum, and point-like appearance. As with blazars, they are aligned so that their plasma jets point in our direction.
* The Deep Photographic Guide to the Constellations: Lacerta
*Weasner's Mighty ETX Site, GO TO LACERTA (a constellation guide for amateur astronomers)
Related Articles
- VnV Nation Interview ...
Lacerta
Abbreviation: Lac English name: Lizard Coordinates see Stellar data ...
Lacerta, also given the alternative title Stellio, depicted in the Firmamentum Sobiescianum star atlas of Johannes Hevelius, published posthumously in 1690.
Image © Tartu Observatory Virtual Museum.
Lacerta (Lizard)
Silver Saint Misty
Origin of the constellation: 1690, Hevelius ...
BL Lacertae
A highly variable object (the most rapid radio variable known, also an optically violent variable - mv = 12 to 15 mag - and an infrared source). Probably an exceedingly compact nonthermal object, and undoubtedly extragalactic.
BL Lacertae
An extreme form of active galactic nucleus in which the light is dominated by nonthermal continuum emission and there are no emission lines present in the spectrum, in contrast to the case of quasars.
Lacerta
About this Java applet / Instructions Constellations is written using Java. You must have a Java enabled browser such as Netscape Navigator to be able to see this applet. Back to Constellations Home Page ...
BL Lacertae objects (NASA Thesaurus) One of a class of astronomical objects exhibiting; (1) rapid variations in intensity at radio, infrared, and optical wavelengths; (2) energy distributions largely at infrared wavelengths; ...
Lacerta (NASA SP-7, 1965) (abbr Lac, Lacr)
See constellation. lag (NASA SP-7, 1965) 1. The delay between change of conditions and the indication of the change on an instrument.
2. Delay in human reaction.
3.
Epsilon Indi
Lacerta (Lacertae) Leo (Leonis)
Regulus (Alpha Leonis)
Alpha Leonis system and Regulan system ...
Handbook of Quasistellar and BL Lacertae Objects, E.R. Craine 1977, Pachart, Tucson. Finding charts, fluxes, positions, references; much less necessary now than it was before the Web.
Lacerta (constellation)
Lagoon Nebula (M8, NGC 6523)
Lagrangian orbit
Lagrangian points
L'Aigle meteorite shower
Laing-Garrington effect
Lalande 21185
Lambda Bootis star
Lambda Eridani star
Large Binocular Telescope (LBT) ...
In 1929 an object thought to be a variable star was discovered in the constellation Lacerta. Astronomers gave it the two-letter code BL, so it became known as BL Lacertae, or BL Lac for short.
The extragalactic nature of BL Lacertae was not a surprise. In 1972 a few variable optical and radio sources were grouped together and proposed as a new class of galaxy: BL Lacertae-type objects.
Pegasus shares borders with Lacerta, Cygnus, Vulpecula, Delphinus, Equuleus, Aquarius, Pisces, and Andromeda.
Alpha Andromedae was Delta Pegasi. It's one corner of the asterism "the Great Square of Pegasus".
Blazar - A type of active galaxy named for BL Lacertae, the first of the type discovered. Blazars show rapid, unpredictable variations in brightness
Bow Shock - The region where the solar wind is slowed as it impinges on the Earth's magnetosphere ...
Constellations adjoining Cephus: Camopardalis, Cassiopeia, Cygnus, Draco, Lacerta, Ursa Minor.
Constellations adjoining Cassiopeia: Andromeda, Camopardalis, Cephus, Cygnus, Lacerta, Perseus.
BL Lac objects are named after BL Lacertae, the class prototype, a highly variable AGN. It was originally thought to be a variable star.
A third type of active galaxy called BL Lacertae objects (BL Lac objects for short) are probably radio galaxies with their jets pointed right at us. The energy from BL Lac objects varies very quickly and erratically.
HEVELIUS, JOHANNES
Johannes Hevelius (1611-1687) was a German who published the first moon map. He also published a celestial atlas introducing many (including Canes Venatici, Lacerta, Lynx, Sextans, etc.).
"passes" (going westward) through Scorpius, Ara, Norma, Triangulum Australe, Circinus, Centaurus, Musca, Crux, Carina, Vela, Puppis, Canis Major, Monoceros, Orion & Gemini, Taurus, Auriga, Perseus, Andromeda, Cassiopeia, Cepheus & Lacerta, ...
4 times the size of Jupiter but has only half the mass of the giant planet. Every 4.5 days it completes an orbit around one member of the double star system ADS 16402, a pair of stars 450 light years distant in the northern constellation of Lacerta.
enormous red shifts identify them as objects at very large distances. Most astronomers now believe that quasars are active galaxies whose nucleii contain enormous black holes. They are probably closely related to radio galaxies and to BL Lacertae ...
constellation, 51 Pegasi, is orbited by the first true extrasolar planets (planets orbiting a star other than the Sun) to have been discovered. Neighboring constellations: Vulpecula - Delphinus - Equuleus - Aquarius - Pisces - Andromeda - Lacerta - ...
 See also: Star, Constellation, Sky, Galaxy, Light
|
