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Men typically lose Y chromosomes from their cells as they get older, which could be affecting their heart health

Test out your knowledge of these famous firsts in skywatching and astrophotography, from the first photos of Earth and the moon to the invention of telescopes!

This telescope has revealed the whipped-up dust from the birth of a star—and a shining background galaxy—more clearly than ever before

Sure, the Moon will be a problem. But clouds are worse. Don't miss one of the best meteor showers of the year.

The post Moon or Not, the Perseid Meteor Shower Is On! appeared first on Sky & Telescope.

Why is this nebula so complex?

New research suggests the first stars weren't the behemoths we expected them to be — which might explain why we haven't seen them yet.

The post Were the Very First Stars Really That Massive? appeared first on Sky & Telescope.

Set an alarm and take a peek east in early dawn to follow Venus and Jupiter through their spectacular conjunction this week.

The post This Week's Sky at a Glance, August 8 – 17 appeared first on Sky & Telescope.

Direct images from the James Webb Space Telescope show what could be a Saturn-mass planet around Alpha Centauri.

The post Alpha Centauri Might Have a Planet, Webb Telescope Finds appeared first on Sky & Telescope.

Even today, the names of women in astronomy are not as well known as they should be.

The post Honoring the Women of Astronomy appeared first on Sky & Telescope.