Lacerta

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, 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.

Lacerta Abbreviation: Lac Genitive: Lacertae Translation: The Lizard Peoria Astronomical Society Lacerta Page Interactive star chart (Java applet) ...

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.

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, 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 Abbreviation: Lac English name: Lizard Coordinates see Stellar data ...

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 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.

Lacerta (abbr Lac, Lacr) See constellation. lag 1. The delay between change of conditions and the indication of the change on an instrument. 2. Delay in human reaction. 3. The amount one cyclic motion is behind another, expressed in degrees.

Peter Barthel Discovering and investigating the various properties of QSOs and active galaxies such as radio galaxies, Seyfert galaxies, and BL Lacertae objects objects over the past three decades, ...

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; ...

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) ...

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.

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 ...

Astronomy Constellations - Lacerta - 1 Lac Identification Data Common Name ...

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.

Little Horse Eri Eridanus River Archernar For Fornax Furnace Gem Gemini Twins Castor Gru Grus Crane Al Na'ir Her Hercules Hercules Ras Algethi Hor Horologium Clock Hya Hydra Sea Serpent Alphard Hyi Hydrus Water Snake Ind Indus Indian Lac Lacerta ...

HEVELIUS, JOHANNES Johannes Hevelius (1611-1687) was a German astronomer who published the first moon map. He also published a celestial atlas introducing many constellations (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 ...

Three years after his death in 1687, Hevelius' Prodromus Astronomiae was published. Inside, he had created several new constellations, including Canes Venatici, Lacerta, Leo Minor, Lynx, Sextans, Scutum, and Vulpecula.

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: Constellation, Star, Magnitude, Sky, Constellations