@hawking.steven actively acted against the #Tories (probably because @theresamay is an alien he knew it) AND he also actively spoke out about aliens throughout his entire life AND he said something bad was going to happen in 2018 AND he died in 2018 AND he died on #PiDay AND this is the same day that Albert Einstein was born WHO was arguably the smartest man ever lived so clearly @theresamay is an #alien
This was taken during the shoot for our engagement photos at Armstrong Redwoods State Natural Preserve, March 14, 2013. It remains one of my favorite pictures of @ubergurl3.14 & me. Photo credit: @erikafrank #redwoods#engagementphotos#piday#secondchanceatlove
This Hubble image shows a massive galaxy cluster glowing brightly in the darkness. Despite its beauty, this cluster bears the distinctly unpoetic name of PLCK G308.3-20.2.
Galaxy clusters can contain thousands of galaxies all held together by the glue of gravity. At one point in time they were believed to be the largest structures in the universe — until they were usurped in the 1980s by the discovery of superclusters. These massive formations typically contain dozens of galaxy clusters and groups and span hundreds of millions of light-years. However, clusters do have one thing to cling on to: superclusters are not held together by gravity, so galaxy clusters still retain the title of the biggest structures in the universe bound by gravity.
One of the most interesting features of galaxy clusters is the stuff that permeates the space between the constituent galaxies: the intracluster medium (ICM). High temperatures are created in these spaces by smaller structures forming within the cluster. This results in the ICM being made up of plasma — ordinary matter in a superheated state. Most luminous matter in the cluster resides in the ICM, which is very luminous in X-rays. However, the majority of the mass in a galaxy cluster exists in the form of non-luminous dark matter. Unlike plasma, dark matter is not made from ordinary matter such as protons, neutrons and electrons. It is a hypothesized substance thought to make up 80% of the universe’s mass, yet it has never been directly observed.
For the full story, head to nasa.gov/hubble
Credit: ESA/Hubble & NASA, RELICS