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16 天
死亡恒星编织出天空之幕
网状星云是一颗质量比太阳重约20倍的大质量恒星经历超新星爆炸后留下的残骸,目前我们所观测到的景象大约在发生这场爆炸后的一万年。哈勃太空望远镜自30多年前就开始对这片超新星残骸进行观测,科学家们对比过去的数据与最新的数据,逐渐揭示气体云团和细丝状结构的动向,从而进一步深化我们对网状星云的理解。
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今日热点
Agrees to policy changes
To resume some flights
Charged with capital murder
Woman drowned her dog
Offers $100 to WI voters
Trump rescinds order
Cuts $580 million in funding
Changes name of DEI program
Large-capacity ban upheld
Signs critical mineral order
NYC jury finds 2 guilty
Nearly departs from taxiway
Brunson files for divorce
Baseball card sells for $1M+
Sued over false advertising
UAE to invest $1.4T in US
68 bridges need assessment
US Treasury lifts sanctions
RU drones strike UKR city
‘Vice Squad’ actor dies
Minnesota senator resigns
US agency kills CO wolf
Australian tourist killed
UCLA sued over attack
Plans to invest $55B+ in US
Awards fighter jet contract
Scores 888th career goal
SBA to cut workforce
Toronto plane crash report
NY congestion deadline
South Florida fire alert
Topples civil rights offices
Giants sign Humphrey
Texas measles cases rise
US sells rockets to Saudi
1st NCAA Tournament win
Pipe bomb attack plea
To handle student loans
Judge blocks deportation
Family sues cartel members
Beef sticks recalled
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