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A star system or stellar system is a small number of stars that orbit each other, bound by gravitational attraction. A large group of stars bound by gravitation...

Opportunity, also known as MER-B (Mars Exploration Rover – B) or MER-1, is a robotic rover that was active on Mars from 2004 until 2018. Opportunity was...

A reusable launch vehicle has parts that can be recovered and reflown, while carrying payloads from the surface to outer space. Rocket stages are the most...

Boötes (/boʊˈoʊtiːz/ boh-OH-teez) is a constellation in the northern sky, located between 0° and +60° declination, and 13 and 16 hours of right ascension...

The RIM-161 Standard Missile 3 (SM-3) is a ship-based surface-to-air missile system used by the United States Navy to intercept short- and intermediate-range...

Spica is the brightest object in the constellation of Virgo and one of the 20 brightest stars in the night sky. It has the Bayer designation α Virginis...

High Resolution Imaging Science Experiment is a camera on board the Mars Reconnaissance Orbiter which has been orbiting and studying Mars since 2006. The...

An Earth mass (denoted as M E {\displaystyle M_{\mathrm {E} }} or M ⊕ {\displaystyle M_{\oplus }} , where 🜨 is the standard astronomical symbol for Earth)...

Zvezda (Russian: Звезда, meaning "star"), Salyut DOS-8, also known as the Zvezda Service Module, is a module of the International Space Station (ISS)....

Ross 248, also called HH Andromedae or Gliese 905, is a small star approximately 10.30 light-years (3.16 parsecs) from Earth in the northern constellation...

Luna 3, or E-2A No.1 (Russian: Луна 3), was a Soviet spacecraft launched in 1959 as part of the Luna programme. It was the first mission to photograph...

The Unha or Eunha (Korean: 은하, 銀河, "Galaxy") is a North Korean expendable carrier rocket, which partially utilizes the same delivery system as the Taepodong-2...

The VLS-1 (Portuguese: Veículo Lançador de Satélites) was the Brazilian Space Agency's main satellite launch vehicle. The launch vehicle would have been...

Lithium burning is a nucleosynthetic process in which lithium is depleted in a star. Lithium is generally present in brown dwarfs and not in older low-mass...

Saros cycle series 156 for lunar eclipses occurs at the moon's ascending node, 18 years 11 and 1/3 days. It contains 81 events. This lunar saros is linked...

Saros cycle series 103 for lunar eclipses occurred at the moon's descending node, 18 years 11 and 1/3 days. It contained at least 82 events. List of lunar...

A penumbral lunar eclipse took place on Wednesday, February 21, 1951. This was 6.4 days after the Moon reached apogee. The magnitude of the eclipse was...

A penumbral lunar eclipse will occur on November 8, 2060. It will be too small to be visually perceptible. In the unlikely assumption that it is perceptible...

A penumbral lunar eclipse will take place on October 28, 2042, according to some sources. This will be 0.4 days after the Moon reached perigee (making...

A total lunar eclipse will occur on Wednesday, June 9, 2123, with maximum eclipse at 05:06 UTC. A dramatic total eclipse lasting 106 minutes and 6 seconds...