Introduction to general relativity this energy loss would be too small to be detectable, but this energy loss was observed in 1974 in a binary pulsar called PSR1913+16. In such a system, one of the orbiting stars is a pulsar. This has two consequences: a pulsar is an extremely dense object known as a neutron star, for which gravitational wave emission is much stronger than for ordinary stars. Also, a pulsar emits a narrow beam of electromagnetic radiation from its magnetic poles. As the pulsar rotates, its beam sweeps over the Earth, where it is seen as a regular series of radio pulses, just
A Beam of Sun to Shake the Sky A Beam of Sun to Shake the Sky A Beam of Sun to Shake the Sky is a public art work by American artist Richard Taylor, located in downtown Milwaukee, Wisconsin. The sculpture was created for the Central Milwaukee Public Library as part of the remodeling of the Wells Street entrance. "A Beam of Sun to Shake the Sky" consists of two vertically oriented sculptures set upon massive granite pedestals in front of the library's glass facade. The sculptures appear made of bright red ribbon-like strips of painted aluminum that snake skyward. The individual strips each contain cut-out letters in