220

Year 220 (CCXX) was a leap year starting on Saturday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Antonius and Eutychianus (or, less frequently, year 973 Ab urbe condita). The denomination 220 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

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Roman Empire

Bajaj Pulsar

The Bajaj Pulsar is a motorcycle brand owned by Bajaj Auto in India. The two wheeler was developed by the product engineering division of Bajaj Auto in association with Tokyo R&D, and later with motorcycle designer Glynn Kerr. Currently there are five variants available, with engine capacities of 135 cc, 150 cc, 180 cc, 200 cc, and 220 cc. Previously it was also offered with a 200 cc DTS-i oil cooled engine, which now has been discontinued. Instead a new version Pulsar 200NS was launched in 2012. But then Pulsar 200NS production was discontinued in August 2015. With an average monthly sales of around 86,000 units in 2011, Pulsar claimed a 2011 market share of 47% in its segment. By April 2012, more than five million units of Pulsar were sold.

Before the introduction of the Pulsar, the Indian motorcycle market trend was towards fuel efficient, small capacity motorcycles (that formed the 80–125 cc class). Bigger motorcycles with higher capacity virtually did not exist (except for Enfield Bullet). The launch and success of Hero Honda CBZ in 1999 showed that there was demand for performance bikes. Bajaj took the cue from there on and launched the Pulsar twins in India on 24 November 2001. Since the introduction and success of Bajaj Pulsar, Indian youth began expecting high power and other features from affordable motorcycles.

Pulsar

A pulsar (short for pulsating radio star) is a highly magnetized, rotating neutron star that emits a beam of electromagnetic radiation. This radiation can be observed only when the beam of emission is pointing toward Earth (much the way a lighthouse can be seen only when the light is pointed in the direction of an observer), and is responsible for the pulsed appearance of emission. Neutron stars are very dense, and have short, regular rotational periods. This produces a very precise interval between pulses that range roughly from milliseconds to seconds for an individual pulsar. Pulsars are believed to be one of the candidates of high and ultra-high energy astroparticles (see also Centrifugal mechanism of acceleration).

The precise periods of pulsars make them useful tools. Observations of a pulsar in a binary neutron star system were used to indirectly confirm the existence of gravitational radiation. The first extrasolar planets were discovered around a pulsar, PSR B1257+12. Certain types of pulsars rival atomic clocks in their accuracy in keeping time.