谷神星可能曾经宜居
谷神星是小行星带最大天体,NASA黎明号探测器提供观测数据。研究显示其内部早期有足够热量维持地下水库和热水供应,类似地球深海热泉。最可能的宜居时期为约25亿至40亿年前。现因热能耗尽而不再宜居。
Satellites play a huge role in our daily lives, supporting everything from global communications to navigation, business, and national security. As space becomes more crowded and commercial satellite use grows, these systems are facing new cyber threats. The challenge is even greater because many satellites still in service were designed decades ago, at a time when cybersecurity wasn’t a focus, which leaves them with limited defenses. In this Help Net Security interview, Brett Loubert, leader … More →
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