Core Viewpoint - The article discusses the accelerated fall of SpaceX's Starlink satellites due to increased solar activity, highlighting the financial implications and operational challenges associated with the satellite constellation [3][10]. Group 1: Satellite Fall Data - From 2020 to 2024, a total of 1,190 low Earth orbit satellites fell, with 583 of them being Starlink satellites. In 2024 alone, 316 Starlink satellites burned up in the atmosphere [4][6]. - The fall of Starlink satellites is linked to solar activity, which has intensified since the start of the 25th solar cycle in 2019, leading to a significant increase in satellite re-entry rates [10][12]. Group 2: Impact of Solar Activity - Solar activity follows an approximately 11-year cycle, with the peak phase causing increased magnetic storms that accelerate satellite re-entry. Higher magnetic activity results in faster re-entry speeds for satellites [12][13]. - The drag force from the thermosphere, although thin, significantly affects satellites at altitudes above 200 kilometers, leading to a reduction in mechanical energy and eventual descent into the atmosphere [12][13]. Group 3: Starlink's Unique Challenges - Nearly half of the satellites that fell in the past five years were Starlink satellites due to their lower orbital altitude, which makes them more susceptible to atmospheric drag during magnetic storms [16]. - Starlink satellites have a design lifespan of about five years, necessitating complete replacement approximately every five years, which could cost over $33 billion if calculated at the lower end of satellite costs [17][18]. Group 4: Financial Considerations - SpaceX's revenue is projected to reach approximately $15.5 billion in 2023, but the financial sustainability of the Starlink project remains uncertain, with concerns about it becoming a financial black hole [19]. - As of December last year, SpaceX's valuation reached $350 billion, a significant increase from $12 billion in 2015, indicating strong growth despite the operational challenges faced by Starlink [20].
马斯克星链卫星,为何大批坠落
虎嗅APP·2025-06-12 11:10