Thousands of Black Holes Surround the Heart of our Galaxy

(From NASA’s Image of the Day, June 19, 2020) Astronomers have discovered evidence for thousands of black holes located near the center of our Milky Way galaxy using data from NASA’s Chandra X-ray Observatory. This black hole bounty consists of stellar-mass black holes, which typically weigh between five to 30 times the mass of our Sun….

NGC 6441: One of the Milky Way’s Most Massive Star Clusters

(NASA’s image of the day on June 5, 2020) Almost like snowflakes, the stars of the globular cluster NGC 6441 sparkle peacefully in the night sky, about 13,000 light-years from the Milky Way’s galactic center. Like snowflakes, the exact number of stars in such a cluster is difficult to discern. It is estimated that together…

Hypothesized First-Gen Stars Remain Unseen in Hubble Deep Views

(News from NASA) New results from the NASA/ESA Hubble Space Telescope suggest the formation of the first stars and galaxies in the early universe took place sooner than previously thought. A European team of astronomers have found no evidence of the first generation of stars, known as Population III stars, as far back as when…

NGC 3147: A Spiral Giant

Here’s a view of NGC 3147, a spiral galaxy 130 million light-years away in the constellation Draco. This image is made from data acquired by Hubble’s WFC3/UVIS instrument in November 2017 (PI Adam Riess). NGC 3147 is about 140,000 light-years wide, so almost half again as big as our Milky Way. See this and more…

A Dark Horse in a Different Light

Here’s a view of the famous Horsehead Nebula (Barnard 33) located 1,375 light-years away from Earth, just under Alnitak, the first star in Orion’s belt. This is a color-composite made from images acquired with Hubble in wide-band infrared in October and November of 2012. (Principal Investigator Z. Levay).

When Galaxies Collide

Here’s a cosmic curiosity: Arp 148, aka “Mayall’s Object,” the aftermath of a collision between two galaxies. It’s located 450 million light-years away in the constellation Ursa Major (of which the Big Dipper is part.) This is my color-composite of Hubble images originally acquired in April 2007 in optical and near-infrared light.

A Dusty Twist Marks the Site of a New Planet’s Birth

  All of the planets in our Solar System formed from a disk of dust and gas surrounding our home star—the Sun—about four and a half billion years ago. Many—maybe even most—of the stars we see in the sky have planets orbiting them, and they all probably formed the same way. But planetary formation is…

Ten Discoveries from SOFIA

(From NASA) Ten years ago, NASA’s telescope on an airplane, SOFIA (the Stratospheric Observatory for Infrared Astronomy), first peered into the cosmos. Since the night of May 26, 2010, SOFIA’s observations of infrared light, invisible to the human eye, have made many scientific discoveries about the hidden universe.