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Wake of a Hidden Stellar Partner Reveals Betelgeuse's Secret Neighbor

Astronomers using the Hubble Space Telescope and ground-based observatories have found direct evidence of a hidden companion star to Betelgeuse, Siwarha, whose orbital wake through the red supergiant’s atmosphere explains Betelgeuse’s six-year brightness cycle and other variability, with the wake matching predictions from an orbiter that completes a six-year orbit and potentially merging with Betelgeuse in the distant future; findings are published in the Astrophysical Journal.

2 hours ago•Source: CNN

Proba-3’s Eye on the Sun Reveals Inner Corona and Eruptions

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2.6 min•7 hours ago

Proba-3’s Eye on the Sun Reveals Inner Corona and Eruptions

ESA’s Proba-3 uses two formation-flying spacecraft and the ASPIICS coronagraph to image the Sun’s inner corona, showing the hot, faint yellow halo and three helium-emission prominence eruptions observed during a five-hour window on Sept. 21, 2025. The animation combines ASPIICS data with NASA’s SDO/AIA imagery to illustrate how artificial eclipses let scientists study the corona’s dynamics, including prominences (cooler plasma) erupting into space and the corona’s light from scattered sunlight and helium emission.

via European Space Agency

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Wake of a Hidden Stellar Partner Reveals Betelgeuse's Secret Neighbor

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