流星雨本周将达到高峰,观测条件有利
仅事实

流星雨本周将达到高峰,观测条件有利

摘要

本周两场较少为人知的流星雨将达到高峰,由于月光较暗,观测条件优于八月的英仙座流星雨。天文学家建议寻找黑暗的天空,并让眼睛适应黑暗,以获得最佳观测效果。

天文爱好者本周有望观测到流星雨,南三角座δ流星雨和摩羯座α流星雨将于7月29日晚至7月30日凌晨达到高峰。与八月中旬将伴随明亮月光的英仙座流星雨不同,本周的流星雨受益于月亮仅约25%盈亏的月相,能见度更佳。

洛厄尔天文台的行星天文学家尼克·莫斯科维茨解释说,八月几乎满月的月光会削弱英仙座流星雨的观赏效果。相比之下,目前的条件可能使观测者每小时看到20至30颗流星。流星雨发生在地球穿过彗星或小行星遗留的碎片时,微小颗粒在大气中燃烧形成明亮的流星。

阿德勒天文馆的天文教育者亨特·米勒指出,这些“流星”通常由尘埃或沙粒大小的碎片引起。莫斯科维茨建议,为了获得最佳观测体验,应在午夜后至黎明前,远离人工光源,给眼睛15至30分钟适应黑暗。他还建议观测南三角座δ流星雨时面向南方,而摩羯座α流星雨虽然较少,但能产生缓慢且明亮的火球。

如果高峰夜天气条件不佳,流星活动仍可在高峰前后几天观察。米勒强调此期间流星雨丰富,鼓励寻找黑暗的天空。尽管八月月光明亮,米勒表示英仙座流星雨仍有机会看到明亮流星。展望未来,莫斯科维茨提到2026年预计将出现一次异常强烈的英仙座流星爆发,届时月亮较暗,流星数量可能达到每小时数百颗。

来源

NPR

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The Southern Delta Aquariids and Alpha Capricornids are set to peak on the night of July 29 into July 30.

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This week's showers benefit from a moon that is only about 25% full, improving visibility.

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The glare of a nearly full moon in August will make the Perseids less compelling this year.

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The current conditions may allow viewers to see up to 20 to 30 meteors per hour from the combined showers.

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Meteor showers occur when Earth passes through debris left by comets or asteroids, producing bright streaks as tiny particles burn up in the atmosphere.

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These shooting stars are often caused by debris as small as dust or grains of sand.

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For the best experience, watching after midnight and before dawn, away from artificial lights, and allowing 15 to 30 minutes for eyes to adjust to the dark is advised.

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The Alpha Capricornids, though less frequent, can produce slow, bright fireballs.

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