<p>A lunar eclipse happens when the moon passes through the shadow Earth makes when it gets in the way of the sun. During a penumbral eclipse, the moon crosses through the outer part of this shadow, known as the penumbra.</p><p>This event can be observed anywhere on the night side of Earth, in this case much of the Americas and parts of East Asia. But only careful observers will really be able to see the eclipse — because the moon doesn’t travel through the darkest part of Earth’s shadow, so the lunar surface only slightly dims in brightness. In the United States, <a href="https://www.nytimes.com/2024/03/24/science/lunar-eclipse-moon-penumbral.html?smid=spacecal">this eclipse will be visible</a> late on Sunday or early on Monday, depending on where you live.</p>
