天文学基础知识详说 (47).ppt

Credit:SOHOThe SunMore about the SunHow big is our Sun?How heavy is our Sun?How hot is our Sun?How old is our Sun?How far away is our Sun?地球的大小地球的大小Credit:SOHOBig?Heavy?Hot?Old?Far?109 Earths(1.4 million km)in diameter330 thousand Earths(2 x 1030 kg)Surface 6000 C，Core 16 million CSame as Earth(4.6 billion years old)Light travels 8 mins；Rockets travels 4 months；Fastest airplane travels 2 years(150 000 000 km)Image Credit:太陽黑子太陽黑子SunspotUmbra本影本影 4000 CPenumbra半影半影 5000 CGranulation米粒組織米粒組織6000 CCredit:RSAS后羿射日后羿射日三足三足鳥鳥/日中鳥日中鳥Credit:NSO太陽黑子數目太陽黑子數目Diagram Credit:NASAData Source:Sunspot Index Data Center太陽高峰期太陽高峰期Solar Maximum太陽低潮期太陽低潮期Solar Minimum?日冕Corona日珥ProminenceCredit:SOHO日珥 ProminenceCredit:SOHO日珥 ProminenceSunny The Bear 太陽熊Credit:SOHOCredit:SOHO太陽風 Solar WindCredit:SOHO極光 AuroraCredit:Dennis MammanaCredit:Grey A.Syverson歷史上的旱災(1777-1778),(1808-1809),(1824-1825),(1835-1837),(1844-1845),(1877-1879)太陽活動的影響Solar Activity will affect 影響氣候 Climate影響生物 Living things影響電子儀器 Electrical InstrumentsCredit:David Tipling