To achieve the spatial distribution of stars in a Globular Cluster, as has been observed, a black hole fraction of 22% is necessary.
Globular clusters are fascinating astronomical objects composed of densely packed groups of stars. They are distinct from open clusters, which typically contain a few hundred stars, as globular clusters can host hundreds of thousands to millions of stars.
The Milky Way is the galaxy that includes the Solar System, with the name describing the galaxy’s appearance from Earth: a hazy band of light seen in the night sky formed from stars that cannot be individually distinguished by the naked eye.
The Milky Way Galaxy is a barred spiral galaxy located in the Local Group of galaxies, which includes over 50 galaxies. It is estimated to be around 120,000 light-years in diameter and contains between 100 and 400 billion stars, with estimates currently leaning toward the higher end of that range. The galaxy is named after the milky appearance of the band of stars visible in the night sky, which is caused by the light from its stars and gas clouds.
The term zenith sometimes means the highest point, way, or level reached by a celestial body on its daily apparent path around a given point of observation.
The Zenith of the Sun is a term used in astronomy to refer to the highest point that the sun reaches in the sky during the day. This occurs when the sun is directly overhead, or at the highest point in its daily arc across the sky.
He is chiefly known for his studies of the rings of Saturn and the discovery of its moon Titan.
Christiaan Huygens, Lord of Zeelhem (April 14, 1629 – July 8, 1695), was a Dutch mathematician, physicist, engineer, astronomer, and inventor, who is regarded as one of the most important figures in the Scientific Revolution. In physics, Huygens made seminal contributions to optics and mechanics, while as an astronomer he is chiefly known for his studies of the rings of Saturn and the discovery of its moon Titan.
Her research focuses on the study of the evolution of the Sun’s magnetic field and how it drives solar activity that in turn leads to space weather at the Earth.
Lucinda “Lucie” May Green was born in 1975 in Bedfordshire, England. She is a British science communicator and solar physicist. Green attended Dame Alice Harpur School in Bedfordshire, gaining 9 GCSEs and 4 A-levels.
Orbital debris is any human-made object in orbit about the Earth that no longer serves a useful function. Such debris includes nonfunctional spacecraft, abandoned launch vehicle stages, mission-related debris, and fragmentation debris.
Vanguard 1, designed to test the launch capabilities of a three-stage launch vehicle as a part of Project Vanguard, and the effects of the space environment on a satellite and its systems in Earth orbit was launched by the USA on March 17, 1958, is the oldest piece of space junk. It stopped operating in 1964 but will continue orbiting Earth for 240 years.
The Sloan Digital Sky Survey or SDSS is a major multi-spectral imaging and spectroscopic redshift survey using a dedicated 2.5-m wide-angle optical telescope at Apache Point Observatory in New Mexico, United States. The project was named after the Alfred P. Sloan Foundation, which contributed significant funding.
Yes, you can watch the International Space Station fly over your house!
***WARNING *** March 2022 was a busy month in space that saw two spacewalks, the arrival of three new cosmonauts, and finally the departure of three crewmates officially ending Expedition 66. Three NASA astronauts and one ESA (European Space Agency) astronaut took a well-deserved break following the intense period aboard the orbiting lab.
The TOLIMAN space telescope is a low-cost, agile mission concept dedicated to astrometric detection of exoplanets in the near-solar environment, particularly targeting the Alpha Centauri system. TOLIMAN stands for Telescope for Orbit Locus Interferometric Monitoring of our Astronomical Neighbourhood.