Topic

Hubble Constant

The present-day expansion rate of the universe, expressed as recession speed per unit distance, and the anchor for cosmic distance and age estimates.

Current clusters

science2 publishers

Hubble spent the day of its 200,000th orbit watching for a supernova to return

NASA pointed the telescope at galaxy cluster MACS J0417 on September 19 to catch a second appearance of supernova Athena, predicted before early March 2027, and the timing would constrain both the cluster's mass and the expansion rate.

Publishers:nasa.govphys.org

Reality

Evidence58
Adoption66
Hype gap+12
Incentives62
Confidence70