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Tunguska event

The Tunguska event was a large explosion, which occurred near the Podkamennaya Tunguska River in what is nowKrasnoyarsk Krai, Russia, at about 07:14 KRAT (00:14 UT) on June 30, 1908. The explosion occurred at an altitude of 5–10 kilometres (3–6 mi) at 60.886°N, 101.894°E. Different studies have yielded widely varying estimates of the impacting object’s size, on…

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Can the opposite of a black hole exist?

In general relativity, a white hole is a hypothetical region of spacetime which cannot be entered from the outside, although matter and light can escape from it. In this sense, it is the reverse of a black hole, which can only be entered from the outside, but from which nothing, including light, can escape. White holes appear in the theory ofeternal black holes. In addition…

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“An unimaginable space between you and me” Trinh Do

Space This article is about the general framework of distance and direction. For the space beyond Earth’s atmosphere, see Outer space. For the keyboard key, see Space bar. For all other uses, see Space (disambiguation). A right-handed three-dimensionalCartesian coordinate system used to indicate positions in space. Space is the boundless three-dimensional extent in which objects and events have relative position and direction. Physical space…

600-cell

Hexacosichoron (600-cell structure) – Trinh Do

In geometry, the 600-cell (or hexacosichoron) is the convex regular 4-polytope, or polychoron, with Schläfli symbol {3,3,5}. Its boundary is composed of 600 tetrahedral cells with 20 meeting at each vertex. Together they form 1200 triangular faces, 720 edges, and 120 vertices. The edges form 72 flat regular decagons. Each vertex of the 600-cell is a vertex of six such decagons. The mutual distances of the…

24-cell

24 cell structure – Trinh Do

In geometry, the 24-cell (or icositetrachoron) is the convex regular 4-polytope, or polychoron, with Schläfli symbol {3,4,3}. It is also called an octaplex (short for “octahedral complex”), octacube, or polyoctahedron, being constructed of octahedral cells. The boundary of the 24-cell is composed of 24 octahedral cells with six meeting at each vertex, and three at each edge. Together they have 96 triangular faces, 96 edges, and 24 vertices. The vertex figure is a cube.…

16-cell

16 cell structure – Trinh Do

In four-dimensional geometry, a 16-cell or hexadecachoron is a regular convex 4-polytope. It is one of the six regular convex 4-polytopes first described by the Swiss mathematician Ludwig Schläfli in the mid-19th century. It is a part of an infinite family of polytopes, called cross-polytopes or orthoplexes. The dual polytope is the tesseract (4-cube).Conway’s name for a cross-polytope is orthoplex, for orthant complex. Geometry It is bounded by 16 cells, all of which are regular tetrahedra. It has…

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“Space is limited” Trinh Do

In mathematics, four-dimensional space (“4D”) is a geometric space with four dimensions. It is typically meant to mean four-dimensional Euclidean space, generalizing the rules of three-dimensional Euclidean space. It has been studied by mathematicians and philosophers for over two centuries, both for its own interest and for the insights it offered into mathematics and related fields. Algebraically it is generated by applying…

120-cell-inner

120-cell structure – Trinh Do

  In geometry, the 120-cell (or hecatonicosachoron) is the convex regular 4-polytope with Schläfli symbol {5,3,3}The boundary of the 120-cell is composed of 120 dodecahedral cells with 4 meeting at each vertex. It can be thought of as the 4-dimensional analog of the dodecahedron and has been called a dodecaplex (short for “dodecahedral complex”), hyperdodecahedron, and polydodecahedron. Just as a dodecahedron can be built up as a model with 12 pentagons, 3 around…

HORIZON - THE HAWKING PARADOX

A remarkable story – Stephen Hawking

FAMED astrophysicist Stephen Hawking believes humans are capable of time travel. Claiming he is not as concerned about being labelled crazy as he once was, Hawking has publicly aired his second startling theory in two weeks, after last week claiming it was “entirely reasonable” to assume aliens existed. Preparing for the debut of his Discovery documentary, Stephen…