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2024 年 4 月 17 日

全食日与彗星
影像提供与版权: Lin Zixuan（林子轩）(Tsinghua U.)

说明： 上星期的日全食期间，太阳附近出现了不只1颗彗星。预期会出现的彗星是庞士-布鲁克斯彗星（ 12P/Pons-Brooks），但它让许多人失望了，因为亮度远不如预期。不过，在长曝光相机影像里，倒是相对不知名的SOHO-5008彗星也现身其中。这颗彗星是从欧洲航天局和美国航太总署的太阳轨道SOHO卫星所拍摄的影像里，辨识出的第5008颗彗星。可能极为娇小的SOHO-5008彗星，是一颗掠日彗星，在近距离掠过太阳后的数个小时之内就崩解了。这张主题影像不仅因在日全食期间记录到2颗彗星而显得不寻常，更因为是极罕见的从地面拍到掠日彗星。影像中还可以看到太阳广袤的日冕、水星（左）和金星（右）。在4月8日扫过北美洲的黝黑月影下方，这幅影像所呈现的行星和彗星之中，只有金星轻易可为聚集在北美各地的数百万观察者所见。

NASA每日天文图片 APOD
2024 年 4 月 17 日

全食日与彗星
影像提供与版权: Lin Zixuan（林子轩）(Tsinghua U.)

说明： 上星期的日全食期间，太阳附近出现了不只1颗彗星。预期会出现的彗星是庞士-布鲁克斯彗星（ 12P/Pons-Brooks），但它让许多人失望了，因为亮度远不如预期。不过，在长曝光相机影像里，倒是相对不知名的SOHO-5008彗星也现身其中。这颗彗星是从欧洲航天局和美国航太总署的太阳轨道SOHO卫星所拍摄的影像里，辨识出的第5008颗彗星。可能极为娇小的SOHO-5008彗星，是一颗掠日彗星，在近距离掠过太阳后的数个小时之内就崩解了。这张主题影像不仅因在日全食期间记录到2颗彗星而显得不寻常，更因为是极罕见的从地面拍到掠日彗星。影像中还可以看到太阳广袤的日冕、水星（左）和金星（右）。在4月8日扫过北美洲的黝黑月影下方，这幅影像所呈现的行星和彗星之中，只有金星轻易可为聚集在北美各地的数百万观察者所见。
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NASA每日天文图片 APOD



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Telegram hopes to raise $1bn with a convertible bond private placement

The super secure UAE-based Telegram messenger service, developed by Russian-born software icon Pavel Durov, is looking to raise $1bn through a bond placement to a limited number of investors from Russia, Europe, Asia and the Middle East, the Kommersant daily reported citing unnamed sources on February 18, 2021.The issue reportedly comprises exchange bonds that could be converted into equity in the messaging service that is currently 100% owned by Durov and his brother Nikolai.Kommersant reports that the price of the conversion would be at a 10% discount to a potential IPO should it happen within five years.The minimum bond placement is said to be set at $50mn, but could be lowered to $10mn. Five-year bonds could carry an annual coupon of 7-8%.

2024 年 4 月 17 日

NASA每日天文图片 APOD TG
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