However, the core's speed means that there's still "no way that you can predict the re-entry time accurately enough to predict the re-entry location in a useful way," McDowell said. The narrower the distribution of answers - the smaller the window of time - the easier it is to predict the weather or rocket re-entry. They make a million guesses about what the atmosphere is going to do and how the rocket's going to tumble and throw those darts at a board and see what the distribution of answers is," the astrophysicist added. Headwind and the shape of the object also affect how much drag it experiences and its slowing rate, leading to a kind of prediction roulette. So, you know, we can do an okay but.but the further out you're trying to predict the weather, the harder it is to get right," McDowell noted. "And, space weather is as hard to predict as Earth weather. Solar activity affects the density of the upper atmosphere, a factor that can impact the time at which the core has slowed down enough to re-enter the atmosphere. The Earth is largely protected from solar winds due to both the planet's magnetic field and its protective atmosphere, the agency said. The density of the atmosphere also depends on the weather in space.Īccording to NASA, space weather is created by activity on the sun's surface, "spewing" gas and particles known as solar wind into space that are charged with electricity.
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