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Sandakada Pahana, also known as Moonstone, is a unique feature of the architecture of ancient Sri Lanka. [ 1 ] [ 2 ] [ 3 ] It is an elaborately carved semi-circular stone slab, usually placed at the bottom of staircases and entrances.
The Sun; Sirius A with Sirius B, a white dwarf; the Crab Nebula, a remnant supernova; A black hole (artist concept); Vela Pulsar, a rotating neutron star; M80, a globular cluster, and the Pleiades, an open star cluster; The Whirlpool Galaxy and Abell 2744, a galaxy cluster; Superclusters, galactic filaments and voids
Moonstone cabochon. The most common moonstone is of the orthoclase feldspar mineral adularia, named for an early mining site near Mt. Adular in Switzerland, now the town of St. Gotthard. [1] [better source needed] A solid solution of the plagioclase feldspar oligoclase +/− the potassium feldspar orthoclase also produces moonstone specimens.
In 1999, the disc was found buried on the Mittelberg hill near Nebra in Germany. [10] It is dated by archaeologists to c. 1800–1600 BC and attributed to the Early Bronze Age Unetice culture. [11] [12] Various scientific analyses of the disc, the items found with the disc, and the find spot have confirmed the Early Bronze Age dating. [13] [14 ...
Astronomers have discovered what may be the brightest object in the universe, a quasar with a black hole at its heart growing so fast that it swallows the equivalent of a sun a day. The black hole ...
For hundreds of a millions of years, the universe existed in the dark ages—an epoch when only primordial gasses existed. Then, a period of reionization, cleared away this foggy existence an ...
Euler diagram showing the types of bodies orbiting the Sun. The following is a list of Solar System objects by orbit, ordered by increasing distance from the Sun. Most named objects in this list have a diameter of 500 km or more. The Sun, a spectral class G2V main-sequence star; The inner Solar System and the terrestrial planets. 2021 PH27; Mercury
The universe also has vast regions of relative emptiness; the largest known void measures 1.8 billion ly (550 Mpc) across. [109] Comparison of the contents of the universe today to 380,000 years after the Big Bang, as measured with 5 year WMAP data (from 2008). [110] Due to rounding, the sum of these numbers is not 100%.