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Planetary science

Intermediate impact factors

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No statistical documentation of objects of a certain size that enter Earth's atmosphere has hitherto been available. Analysis of data from US government satellites has bridged the gap.

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Figure 1: Shooting stars.

AP (main image); J. W. YOUNG (TMO, JPL, NASA) (inset)

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Correspondence to Robert Jedicke.

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Jedicke, R. Intermediate impact factors. Nature 420, 273–274 (2002). https://doi.org/10.1038/420273a

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