Clyde Tombaugh

Tombaugh created his photographic plates using this 13-inch astrograph

Tombaugh compared his photographic plates using this blink comparator.

Clyde William Tombaugh (/ˈtɒmbaʊ/; February 4, 1906 –January 17, 1997) was an American astronomer. He discovered Pluto in 1930, the first object to be discovered in what would later be identified as the Kuiper belt. At the time of discovery, Pluto was considered a planet but was later reclassified as a dwarf planet. Tombaugh also discovered many asteroids. He also called for the serious scientific research of unidentified flying objects, or UFOs.

单词	Tombaugh
释义	Tombaugh 原声例句 PBS太空科学 Those sharp mountains and Tombaugh Regio's crater-free surface means that these features are pretty young, at least in planetary terms. 那些陡峭的山脉和汤博区没有陨石坑的表面意味着这些特征还很年轻，至少从行星的角度来看是这样。英语百科 Clyde Tombaugh Clyde William Tombaugh (/ˈtɒmbaʊ/; February 4, 1906 –January 17, 1997) was an American astronomer. He discovered Pluto in 1930, the first object to be discovered in what would later be identified as the Kuiper belt. At the time of discovery, Pluto was considered a planet but was later reclassified as a dwarf planet. Tombaugh also discovered many asteroids. He also called for the serious scientific research of unidentified flying objects, or UFOs.
随便看	weldite的意思 Weldiya的意思 weldiya waldia的意思 weld jig的意思 weld joint的意思 weld joint configration的意思 weld joint efficiency的意思 weld joints的意思 weld junction的意思 weld lap的意思 weld layer的意思 weld leakage的意思 weld leg的意思 weld length的意思 weldless的意思 weldless connection的意思 weldless derrick的意思 weldless drawn pipe的意思 weldless fitting的意思 weldless pipe的意思 weldless steel pipe的意思 weldless steel tube的意思 weldless tube的意思 Weld line的意思 weld location的意思