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Making square nebulae from round stars

red triangle nebula

The red triangle nebula helps astronomers work out how round stars turn into square planetary nebulae Source: NASA.

Study reveals how spherical stars turn into aspherical nebulae. Also; a new way to predict volcanic eruptions, and NASA solves the mystery of the Martian doughnut.

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Subjects: astronomy-space, telescopes, spacecraft, geology, physics, stars