Hubble’s Great Triumph: The Expansion Rate of the Universe Is No Longer a Secret

Hubble Space Telescope on Instagram: "A shot in the dark ✨ While most galaxies shine bright, a rare type remains nearly invisible — low-surface-brightness galaxies dominated by dark matter and containing only a scattering of faint stars. (Dark matter is an invisible form of matter that does not reflect, emit, or absorb light.) Hubble managed to identify one such elusive object, dubbed CDG-2, by revealing a close collection of four globular star clusters in the Perseus galaxy cluster, 300 million

@hubble.view on Instagram: "Go with flow❤️‍🩹😌"

ESA - European Space Agency on Instagram: "Where’d all the time go? 🥹💙 On 24 April 2025, @hubbleesa turns 35! We are celebrating with some old and more recent images taken by Hubble. This stretches from the planet Jupiter to dramatic images of stellar birth and death, to a magnificent neighbouring galaxy. 📸 1995 Jeff Hester and Paul Scowen (@arizonastateuniversity), and @NASA/@europeanspaceagency; @creativecommons BY 4.0 📸 1999 NASA, ESA, Andrew Fruchter (@space_telescopes), and the ERO team