Archives des Astronomy | Esprit S.F.

Dico S.F. – Planetoid

Bones — Sat, 04 Apr 2020 08:59:36 +0000

Meaning “shaped as a planet”, the term planetoid refers to a (small) celestial body possessing some planet characteristics, notably its almost spherical shape, but not the size.

It’s also called “dwarf planet” or “minor planet”.

Matching … Lire la suite...

L’article Dico S.F. – Planetoid est apparu en premier sur Esprit S.F..

Dico S.F. – Planet

Bones — Sat, 04 Apr 2020 08:50:30 +0000

In astronomy, a planet is a celestial body orbiting around the Sun and possessing a sufficient mass for its own gravity gives it a (almost) spherical shape.

In science fiction, this term is generalised to every celestial body matching the … Lire la suite...

L’article Dico S.F. – Planet est apparu en premier sur Esprit S.F..

Dico S.F. – Meteorite

Bones — Sat, 04 Apr 2020 08:41:41 +0000

A meteorite designates a small celestial body which reaches the Earth surface.

To properly speak about meteorite, its size must be under fifty meters (beyond that, we speak about asteroid). The luminous trail leaved behind by a meteorite during its … Lire la suite...

L’article Dico S.F. – Meteorite est apparu en premier sur Esprit S.F..

Dico S.F. – Exoplanet

Bones — Sat, 04 Apr 2020 08:29:18 +0000

An exoplanet designates a planet gravitating around a star different than our Sun.

See: Planet… Lire la suite...

L’article Dico S.F. – Exoplanet est apparu en premier sur Esprit S.F..

Dico S.F. – Comet

Bones — Sat, 04 Apr 2020 08:26:56 +0000

A comet is a small celestial body gravitating around a star on a very elliptical orbit (unlike the asteroids). During its travel, it approaches very close to the star and, under the solar wind effect, adorns with a luminous trail … Lire la suite...

L’article Dico S.F. – Comet est apparu en premier sur Esprit S.F..

Dico S.F. – Asteroid

Bones — Sat, 04 Apr 2020 08:19:03 +0000

An asteroid is a small celestial body (between several dozens meters and several hundreds of kilometres) gravitating around a star on an faintly elliptical orbit (unlike the comets). Asteroids are solitary and don’t orbit around planets.

The more often, the … Lire la suite...

L’article Dico S.F. – Asteroid est apparu en premier sur Esprit S.F..

Dico S.F. – Galaxy

Bones — Sat, 04 Apr 2020 06:18:36 +0000

In the field of astronomy, a galaxy is a gathering (of a size superior to 200 parsecs) of billions of stars bounded by gravitational forces.

Matching words: Star, Star cluster

In the movie Men in Black II directed… Lire la suite...

L’article Dico S.F. – Galaxy est apparu en premier sur Esprit S.F..

Dico S.F. – Star cluster

Bones — Sat, 04 Apr 2020 06:08:22 +0000

A star cluster designates a small star concentration in a relatively reduced space to the astronomical scale (a few dozens to a few hundreds parsecs), bounded together by gravitational forces.

A cluster is distinct from a galaxy by the … Lire la suite...

L’article Dico S.F. – Star cluster est apparu en premier sur Esprit S.F..

Dico S.F. – Neutronium

Bones — Thu, 02 Apr 2020 06:06:27 +0000

In the field of physics, the word neutronium designates a degenerated state of matter existing only in neutron stars.

With the extreme pressure and temperature conditions that prevail, atoms can’t no longer exist, electrons merging with protons. It only remains … Lire la suite...

L’article Dico S.F. – Neutronium est apparu en premier sur Esprit S.F..

Dico S.F. – Collapsar

Bones — Wed, 01 Apr 2020 11:05:23 +0000

In astrophysics, a collapsar, contraction of the words “collapsed” and “star”, designates a massive star’s collapsing theoretical model, allowing to explain the phenomenon of gamma-ray bursts.

In The Forever War written by Joe Haldeman, the collapsar jump is an … Lire la suite...

L’article Dico S.F. – Collapsar est apparu en premier sur Esprit S.F..