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NASA 关闭航海家的科学设备以节省电力
#NASA

NASA JPL 任务工程师于 2 月 25 日关闭了航海家 1 号上的宇宙射线子系统实验装置,将于 3 月 24 日关闭航海家 2 号上的低能带电粒子仪,希望借此减缓两艘探测器电力消耗的速度。航海家 1 号和 2 号于 1977 年发射,近五十年来持续依靠其放射性同位素动力系统,也就是利用钸衰变的热量产生电力。项目经理表示:如果我们现在不关闭每艘航海家号上的部分仪器,那么它们的电力可能只能维持几个月。这也不是第一次关闭航海家号的部分机能,早在去年十月,科学家们便因为航海家二号上测量等离子体粒子数量及方向的等离子体科学仪器收集的数据有限,而关闭仪器以节省电力。
NASA JPL:NASA Turns Off 2 Voyager Science Instruments to Extend Mission
天文館:NASA關閉航海家探測器部分儀器以延長壽命



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NASA 关闭航海家的科学设备以节省电力
#NASA

NASA JPL 任务工程师于 2 月 25 日关闭了航海家 1 号上的宇宙射线子系统实验装置,将于 3 月 24 日关闭航海家 2 号上的低能带电粒子仪,希望借此减缓两艘探测器电力消耗的速度。航海家 1 号和 2 号于 1977 年发射,近五十年来持续依靠其放射性同位素动力系统,也就是利用钸衰变的热量产生电力。项目经理表示:如果我们现在不关闭每艘航海家号上的部分仪器,那么它们的电力可能只能维持几个月。这也不是第一次关闭航海家号的部分机能,早在去年十月,科学家们便因为航海家二号上测量等离子体粒子数量及方向的等离子体科学仪器收集的数据有限,而关闭仪器以节省电力。
NASA JPL:NASA Turns Off 2 Voyager Science Instruments to Extend Mission
天文館:NASA關閉航海家探測器部分儀器以延長壽命

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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%.

To pay the bills, Mr. Durov is issuing investors $1 billion to $1.5 billion of company debt, with the promise of discounted equity if the company eventually goes public, the people briefed on the plans said. He has also announced plans to start selling ads in public Telegram channels as soon as later this year, as well as offering other premium services for businesses and users.

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