亚马逊即将发射卫星以提供互联网服务
亚马逊公司计划于4月9日发射超过二十颗卫星，以支持其“项目库帕”的互联网服务。这次名为“KA-01”的任务将采取美国联合发射联盟（ULA）的Atlas V火箭从佛罗里达州的卡纳维拉尔角发射，目标是将27颗卫星部署至280英里（约450公里）高度的近地轨道。发射当天会进行直播，预计在美国东部时间中午12点之前进行。
此项计划预计将为全球几乎任何地点提供高速、低延迟的互联网服务，并打算在未来几年内进行多次发射，最终部署超过3200颗卫星。亚马逊表示，这些卫星将以超过每小时17000英里的速度围绕地球运转，第一批卫星将帮助建立有效的网络基础设施，计划在今年晚些时候向客户提供互联网服务。
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Most people buy Bitcoin via exchanges, such as Coinbase. Exchanges allow you to buy, sell and hold cryptocurrency, and setting up an account is similar to opening a brokerage account—you’ll need to verify your identity and provide some kind of funding source, such as a bank account or debit card. Major exchanges include Coinbase, Kraken, and Gemini. You can also buy Bitcoin at a broker like Robinhood. Regardless of where you buy your Bitcoin, you’ll need a digital wallet in which to store it. This might be what’s called a hot wallet or a cold wallet. A hot wallet (also called an online wallet) is stored by an exchange or a provider in the cloud. Providers of online wallets include Exodus, Electrum and Mycelium. A cold wallet (or mobile wallet) is an offline device used to store Bitcoin and is not connected to the Internet. Some mobile wallet options include Trezor and Ledger.
The lead from Wall Street offers little clarity as the major averages opened lower on Friday and then bounced back and forth across the unchanged line, finally finishing mixed and little changed.The Dow added 33.18 points or 0.10 percent to finish at 34,798.00, while the NASDAQ eased 4.54 points or 0.03 percent to close at 15,047.70 and the S&P 500 rose 6.50 points or 0.15 percent to end at 4,455.48. For the week, the Dow rose 0.6 percent, the NASDAQ added 0.1 percent and the S&P gained 0.5 percent.The lackluster performance on Wall Street came on uncertainty about the outlook for the markets following recent volatility.
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