Star System With Right-Angled Planets Surprises Astronomers

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By Jonathan O’Callaghan, The New York Times. 

Excerpt: Two planets orbit the poles while another revolves around the star’s equator, suggesting a mysterious, undetected force.… See also A Mysterious, Undetected Force Is Influencing the Orbit of Two Alien Worlds and the paper -- The Rossiter–McLaughlin effect revolutions: an ultra-short period planet and a warm mini-Neptune on perpendicular orbits.

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