bl lacertae object造句

• It lent its name to a whole type of celestial objects, the BL Lacertae objects ( a subtype of blazar ).
• BL Lacertae is the original member of a type of blazar known as " BL Lacertae objects "; also termed simply " BL Lac objects ".
• BL Lacertae is the prototype of the BL Lacertae objects, which appear to be dim variable stars but are actually the variable nuclei of elliptical galaxies; they are similar to quasars.
• OJ 287 is a BL Lacertae object located 3.5 among the largest known, with a mass of 18 billion solar masses, more than six times the value calculated for the previous largest object.
• It has been proposed M87 could actually be a BL Lacertae object ( with a low-luminosity nuclei compared with the brightness of its host galaxy ) seen from an unfavorable angle to appreciate the properties of that kind of galaxies.
• This terminology was soon shortened to " BL Lacertae object ", " BL Lac object " or simply " BL Lac " . ( Note that the latter term can also mean the original blazar and not the entire class .)