Mark Zastrow - Profile and Journalist Details

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Total articles 300

• K2-18 b could have dimethyl sulfide in its air. But is it a sign of life?

  By Mark Zastrow| Astronomy Magazine Verified Scientists have reported new observations from NASA’s James Webb Space Telescope (JWST) that strengthen the case that the exoplanet K2-18 b has molecules in its atmosphere that, on Earth, are produced only by life. The work, announced Wednesday, builds on previous observations from JWST published in 2023 by the same team that yielded weak hints of the molecule dimethyl sulfide (DMS) on K2-18 b, a planet that the team thinks could be covered with a global ocean.

  By Mark Zastrow · Astronomy Magazine

  Apr. 17, 2025

• No relief for astronomy industry in new tariff exemptions

  By Mark Zastrow| Astronomy Magazine Verified Exceptions announced today to the Trump administration’s so-called “reciprocal tariffs” are unlikely to provide any relief to the amateur astronomy industry, as they do not cover categories for telescopes, mounts, or digital cameras. The updated guidance from U.S. Customs and Border Protection (CBP) affects the reciprocal tariffs imposed by U.S. President Donald Trump on April 9.

  By Mark Zastrow · Astronomy Magazine

  Apr. 12, 2025

• K2-18 b could have dimethyl sulfide in its air. But is it a sign of life?

  By Mark Zastrow| Astronomy Magazine Verified Scientists have reported new observations from NASA’s James Webb Space Telescope (JWST) that strengthen the case that the exoplanet K2-18 b has molecules in its atmosphere that, on Earth, are produced only by life. The work, announced Wednesday, builds on previous observations from JWST published in 2023 by the same team that yielded weak hints of the molecule dimethyl sulfide (DMS) on K2-18 b, a planet that the team thinks could be covered with a global ocean.

  By Mark Zastrow · Astronomy Magazine

  Apr. 17, 2025

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Astronomy Magazine

Astronomy Magazine is the largest circulation publication dedicated to astronomy, founded in August 1973. It started with a 48-page issue and has grown into a leading source for information on astronomy, observing, and spaceflight news. The magazine is based in suburban Milwaukee, Wisconsin, and has a strong presence in both print and online formats. The magazine offers a monthly print edition with a circulation of 100,000 copies, featuring in-depth articles on astrophysics, planetary science, and cosmology. It also provides observing guides for celestial events. The website attracts 400,000 visitors each month, offering a variety of astronomy-related news and resources. Astronomy Magazine engages a broad audience of astronomy enthusiasts through its significant social media presence, with 1.2 million followers on Facebook and 65,000 on Twitter.