The US Government has released a new trove of documents on cases of “unidentified anomalous phenomena” (UAPs)—many of which would have been described in the past as unidentified flying objects or UFOs—including photos, videos and reports of unexplained events sighted in the sky and in space.

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The twinkling stars in the night sky are not just beautiful to look at. Their flickering reveals something about the varying temperatures and densities in the layers of Earth’s atmosphere, which refract the light as it travels toward us. Certain stellar remnants that emit radio waves can exhibit a very similar effect.

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This month, ESA’s Mars Express takes us to Shalbatana Vallis: a fascinating Martian valley surrounded by signs of water, lava, craters and chaos. Shalbatana Vallis is an impressive channel near Mars’s equator. This image, taken by Mars Express’s High Resolution Stereo Camera (HRSC), captures the northern part of the channel, which weaves its way across […]

NASA’s TESS (Transiting Exoplanet Survey Satellite) has released its most complete view of the starry sky to date, filling in gaps from previous observations. Nearly 6,000 colored dots scattered across the image show the locations of either confirmed or candidate exoplanets—worlds beyond our solar system—identified by the mission as of September 2025 at the end […]

Silicon carbide (SiC) dust is one of the most important ingredients in cosmic dust, the tiny particles floating throughout the cosmos that eventually give rise to new planets and stars. This compound of silicon and carbon is forged in the atmospheres of dying stars, especially carbon-rich ones, but exactly how has long remained a mystery. […]

Nasa is developing ways to use nuclear power to send spacecraft to their destinations. Nuclear propulsion could greatly reduce the journey time to Mars, perhaps cutting a voyage of more than six months to three or four months.

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