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Dark Energy

A term that describes the accelerating expansion of the universe. The expansion may be caused by a “repulsive” force that makes the universe expand faster as it ages, a discrepancy in the laws of gravity, or some other phenomenon.


The universe seems to be pervaded with a previously unknown, and still unexplain

Dark Energy May 21, 2010

Radio Programs

Euclid Looking deep into the “dark” universe July 4, 2023

First Catalog A first catalog for a big project April 26, 2023

Vacuum The not-so-empty vacuum of space September 7, 2021

New Missions Pondering new explorations June 5, 2020

Double Cluster Sparkling stellar jewels March 3, 2019

G Stars A rare class of stars October 20, 2018

Saturn at Opposition Racing past three bright planets June 24, 2018

Coma Berenices Sparkly tresses near the lion May 9, 2018

HETDEX A new look at ancient galaxies April 9, 2017

Dark Energy One of the great mysteries of the universe April 8, 2017

Featured Images

stars spin around the Hobby-Eberly Telescope at McDonald Observatory

First Views April 26, 2023

Hiding in the Sunlight October 31, 2022

Copeland's Septet, a collection of galaxies

Sparkling Septet January 18, 2021