An aperture mask is a simple device for easier observing that increases the effective focal ratio of a telescope.

By Vincent DiFonzo, Editor-in-Chief Professor Ian Clarke began working for Gettysburg College in 1991, taking a job as an ...

Despite their eight eyes, most spiders have terrible vision, but there are a few that have shockingly capable vision which ...

Discover why we've given the ZWO Seestar S30 smart telescope nearly top marks in our latest smart telescope review.

NASA's newest space telescope, on a mission to study origins of universe, snapped incredible images of the cosmos 2 months ...

The ELT is on its way to becoming the largest optical telescope in the world, and as it rises beneath some of the clearest ...

Using the James Webb Space Telescope, a collaboration of NASA and its European and Canadian counterparts, a team of ...

Beneath Chile’s brilliant skies, the ELT grows—an engineering giant ready to capture the secrets of the universe with the ...

Planet TOI-421b lacks the haze of other exoplanets, which means we're able to get a surprisingly clear understanding of it.