Astronomy Picture of the Day<p>APOD from 2025-07-26</p><p>Globular Cluster Omega Centauri</p><p>Omega Centauri, or NGC 5139, is a dense globular cluster with 10 million ancient stars within 150 light-years. It's the brightest in the Milky Way at 15,000 light-years away. Unlike typical clusters, it has varied star ages and compositions, possibly being a merged <a href="https://mastodon.bot/tags/galaxy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>galaxy</span></a>'s core.</p><p>HD image at <a href="https://apod.nasa.gov/apod/ap250726.html#space" rel="nofollow noopener" target="_blank"><span class="invisible">https://</span><span class="ellipsis">apod.nasa.gov/apod/ap250726.ht</span><span class="invisible">ml#space</span></a> <a href="https://mastodon.bot/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomy</span></a> <a href="https://mastodon.bot/tags/hubble" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>hubble</span></a> <a href="https://mastodon.bot/tags/telescope" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>telescope</span></a></p>