Search results

A sextant is a doubly reflecting navigation instrument that measures the angular distance between two visible objects. The primary use of a sextant is...

In physical cosmology, Big Bang nucleosynthesis (also known as primordial nucleosynthesis, and abbreviated as BBN) is the production of nuclei other than...

Shavit 2 (Hebrew: "comet" – שביט) is a small lift launch vehicle produced by Israel from 1982 onwards, to launch satellites into low Earth orbit. It was...

Ofeq, also spelled Offek or Ofek (Hebrew: אופק, lit. Horizon) is the designation of a series of Israeli reconnaissance satellites first launched in 1988...

In the fields of Big Bang theory and cosmology, reionization is the process that caused electrically neutral atoms in the universe to reionize after the...

The Concurrent Design Facility (CDF) is the European Space Agency main assessment center for future space missions and industrial review. Located at ESTEC...

An HI region or H I region (read H one) is a cloud in the interstellar medium composed of neutral atomic hydrogen (HI), in addition to the local abundance...

The RD-253 ( Russian: Раке́тный дви́гатель 253 , Rocket Engine 253) and its later variants, the RD-275 and RD-275M, are liquid-propellant rocket engines...

The Baikal booster (Russian: Байкал) was a proposed reusable flyback booster for the Angara rocket family based on the Angara Universal Rocket Module in...

Boris Vladimirovich Morukov (Russian: Бори́с Влади́мирович Моруков; 1 October 1950 – 1 January 2015) was a Russian physician at the State Research Center...

Seleucus is a lunar impact crater located in the western part of Oceanus Procellarum. To the west is the lava-flooded remains of the walled plain Eddington...