Tetractys.

The Tetractys (also known as the Decad) is an equilateral Triangle formed from the sequence of the first ten numbers aligned in four rows. It is both a Mathematical idea and a Metaphysical Symbol that embraces within itself - in Seedlike form - the Principles of the Natural World, the Harmony of the Cosmos, the Ascent to the Divine, and the Mysteries of the Divine Realm. So revered was this Ancient Symbol that it inspired Ancient Philosophers to swear by the name of the one who brought this gift to Humanity - Pythagoras.

Extragalactic peculiarity

This galaxy goes by the name of ESO 162-17 and is located about 40 million light-years away in the constellation of Carina. At first glance this image seems like a fairly standard picture of a galaxy with dark patches of dust and bright patches of young, blue stars. However, a closer look reveals several peculiar features.

Firstly, ESO 162-17 is what is known as a peculiar galaxy — a galaxy that has gone through interactions with its cosmic neighbours, resulting in an unusual amount of dust and gas, an irregular shape, or a strange composition.

Secondly, on 23 February 2010 astronomers observed the supernova known as SN 2010ae nestled within this galaxy. The supernova belongs to a recently discovered class of supernovae called Type Iax supernovae. This class of objects is related to the better known Type-Ia supernovae.

Credit: ESA/Hubble & NASA
Source: http://www.spacetelescope.org/images/potw1516a/

NASA Astronomy Picture of the Day 2015 May 5

Gravitational Anomalies of Mercury

What’s that under the surface of Mercury? The robotic MESSENGER spacecraft that had been orbiting planet Mercury for the past four years had been transmitting its data back to Earth with radio waves of very precise energy. The planet’s gravity, however, slightly changed this energy when measured on Earth, which enabled the reconstruction of a gravity map of unprecedented precision. Here gravitational anomalies are shown in false-color, superposed on an image of the planet’s cratered surface. Red hues indicate areas of slightly higher gravity, which in turn indicates areas that must have unusually dense matter under the surface. The central area is Caloris Basin, a huge impact feature measuring about 1,500 kilometers across. Last week, after completing its mission and running low on fuel, MESSENGER was purposely crashed onto Mercury’s surface.