A stunning image from the James Webb Space Telescope revealing concentric angular rings around a giant, distant star stirred a frenzy online in September. "It must be aliens," some geeks speculated.
MR. G. W. WALKER tells me that he has sent to NATURE his interesting problem of the mutual attraction between two uniform concentric hemispherical shells, bounded by a common diametral plane. The ...
A young star cluster surrounded by three concentric bubbles was recently found near the M33 galaxy, revealing a cosmic splendor that could be compared to Russian matryoshka nesting dolls. The ...
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