adj.彗星的，彗星似的

A comet is a celestial object that appears as a bright, glowing trail of gas and dust behind it, often with a visible nucleus.
彗星是一种天体，表现为尾随其后的明亮气体和尘埃轨迹，通常有一个可见的核心。
The Halley's Comet makes its periodic appearance in the night sky, thrilling astronomers and skywatchers alike.
哈雷彗星定期出现在夜空中，让天文学家和观星者都感到兴奋。
The comet's tail extends for millions of kilometers, a testament to the solar wind's powerful influence.
彗星的尾巴延伸数百万公里，显示了太阳风的强大作用。
The comet's coma, a glowing cloud surrounding the nucleus, is caused by sublimation of ice particles under the sun's heat.
彗星的彗发，即核心周围发光的云团，是由于太阳热量下冰粒升华的结果。
Astronomers study comets to learn more about the early conditions of our solar system and the potential presence of water on Earth.
天文学家研究彗星以了解太阳系早期条件，以及地球上水存在的可能性。
Many ancient cultures believed comets were omens or portents of significant events, like wars or natural disasters.
许多古代文化认为彗星是重大事件的预兆，如战争或自然灾害。
In 2019, comet Borisov was discovered by an amateur astronomer, highlighting the importance of citizen science in space exploration.
(2019年，业余天文学家发现了一颗彗星Borisov，这突显了公民科学在太空探索中的重要性。
Comets are often referred to as "dirty snowballs" due to their icy composition mixed with dust particles.
彗星常被称为“脏雪球”，因为它们由冰块和尘埃粒子混合组成。
The Rosetta spacecraft successfully landed on comet 67P/Churyumov-Gerasimenko, providing unprecedented data about these mysterious objects.
罗塞塔号探测器成功降落在彗星67P/楚留莫夫-格拉西缅科上，提供了关于这些神秘天体前所未有的数据。
The Perseid meteor shower, which originates from the comet Swift-Tuttle, is one of the most spectacular annual celestial events for stargazers.
源自Swift-Tuttle彗星的英仙座流星雨是观星者每年最壮观的天文现象之一。