Background: Sudano was born in Flatbush, Brooklyn, New York to Margaret Alessio (1924-2012) and Louis Sudano (1923-2008). At the age of four, Sudano learned to play his first instrument, the accordion. He later taught himself to play piano and guitar. He soon developed a reputation in his community as a talented musician and got his first paid gig at the age of twelve.
Context: In 1977, Sudano, Esposito and Hokenson moved to Los Angeles, formed the band Brooklyn Dreams and signed a recording deal with Millennium Records. That same year, Skip Konte of Three Dog Night produced their first self-titled debut. The trio scored a modest hit with the single "Music, Harmony and Rhythm", which they performed on American Bandstand.  On March 13, 1977, Sudano met Donna Summer, who was signed to Casablanca Records. Casablanca was the distributor for Sudano's label Millennium Records. The Brooklyn Dreams and Summer immediately began writing songs together and within a few months Sudano and Summer were dating. In 1978, the band penned "Take It to the Zoo" with Summer for the Thank God It's Friday soundtrack. The same year, the Brooklyn Dreams appeared in the movie American Hot Wax performing as the Planotones, a group created for the movie with long time friend Kenny Vance. They scored a Top 5 hit when they appeared on the single "Heaven Knows" with Esposito and Summer singing a duet. The song peaked at #4 on the Billboard Hot 100 chart and became a certified million-selling Gold single in 1979.  In 1979, Brooklyn Dreams and Summer wrote the title track "Bad Girls" for the best selling album of Summers' career Bad Girls. In addition to the title track, Sudano also co-wrote the songs "Lucky" and "On My Honor" with Summer and Harold Faltermeyer as well as "Can't Get to Sleep At Night" with Bob Conti. He then wrote the song "I'm A Rainbow", which was the title track to Summer's next LP. Unfortunately, it was shelved by Geffen Records and not released until 1996.  When Millennium Records changed their distribution to RCA, the Brooklyn Dreams contract was transferred to Casablanca Records. Under their new recording contract, Brooklyn Dreams recorded three more studio LPs. They released two albums in 1979: Sleepless Nights, produced by Bob Esty, and Joyride produced by Jurgen Koppers, an engineer for Giorgio Moroder. In 1980, they made their fourth and final album Won't Let Go, which they produced themselves. A song from this record, "Hollywood Knights" became the title track for the comedy The Hollywood Knights starring Tony Danza, Michelle Pfeiffer and Fran Drescher. In 2008, "Hollywood Knights" was sampled by Snoop Dogg on his song "Deez Hollywood Nights".  Brooklyn Dreams amicably disbanded in 1980 when Hokensen returned to New York after his mother died. Sudano and Summer continued writing songs together and were married the same year.
Question: Was this band successful?
Answer: In 1979, Brooklyn Dreams and Summer wrote the title track "Bad Girls" for the best selling album of Summers' career Bad Girls.

Background: Zhang Heng (Chinese: Zhang Heng ; AD 78-139), formerly romanized as Chang Heng, was a Han Chinese polymath from Nanyang who lived during the Han dynasty. Educated in the capital cities of Luoyang and Chang'an, he achieved success as an astronomer, mathematician, scientist, engineer, inventor, geographer, cartographer, artist, poet, statesman, and literary scholar. Zhang Heng began his career as a minor civil servant in Nanyang. Eventually, he became Chief Astronomer, Prefect of the Majors for Official Carriages, and then Palace Attendant at the imperial court.
Context: Zhang Heng's mechanical inventions influenced later Chinese inventors such as Yi Xing, Zhang Sixun, Su Song, and Guo Shoujing. Su Song directly named Zhang's water-powered armillary sphere as the inspiration for his 11th-century clock tower. The cosmic model of nine points of Heaven corresponding with nine regions of earth conceived in the work of the scholar-official Chen Hongmou (1696-1771) followed in the tradition of Zhang's book Spiritual Constitution of the Universe. The seismologist John Milne, who created the modern seismograph in 1876 alongside Thomas Gray and James A. Ewing at the Imperial College of Engineering in Tokyo, commented in 1886 on Zhang Heng's contributions to seismology. The historian Joseph Needham emphasized his contributions to pre-modern Chinese technology, stating that Zhang was noted even in his day for being able to "make three wheels rotate as if they were one." More than one scholar has described Zhang as a polymath. However, some scholars also point out that Zhang's writing lacks concrete scientific theories. Comparing Zhang with his contemporary, Ptolemy (83-161) of Roman Egypt, Jin Guantao, Fan Hongye, and Liu Qingfeng state:  Based on the theories of his predecessors, Zhang Heng systematically developed the celestial sphere theory. An armillary constructed on the basis of his hypotheses bears a remarkable similarity to Ptolemy's earth-centered theory. However, Zhang Heng did not definitely propose a theoretical model like Ptolemy's earth-centered one. It is astonishing that the celestial model Zhang Heng constructed was almost a physical model of Ptolemy's earth-centered theory. Only a single step separates the celestial globe from the earth-centered theory, but Chinese astronomers never took that step.  Here we can see how important the exemplary function of the primitive scientific structure is. In order to use the Euclidean system of geometry as a model for the development of astronomical theory, Ptolemy first had to select hypotheses which could serve as axioms. He naturally regarded circular motion as fundamental and then used the circular motion of deferents and epicycles in his earth-centered theory. Although Zhang Heng understood that the sun, moon and planets move in circles, he lacked a model for a logically structured theory and so could not establish a corresponding astronomical theory. Chinese astronomy was most interested in extracting the algebraic features of planetary motion (that is, the length of the cyclic periods) to establish astronomical theories. Thus astronomy was reduced to arithmetic operations, extracting common multiples and divisors from the observed cyclic motions of the heavenly bodies.
Question: what was his biggest accomplishment?
Answer:
Based on the theories of his predecessors, Zhang Heng systematically developed the celestial sphere theory.