The European Lunar Explorer (ELE) or European Lunar Lander (ELL) was a planned

Romania Romania ( ; ro, România ) is a country located at the crossroads of Central Europe, Central, Eastern Europe, Eastern, and Southeast Europe, Southeastern Europe. It borders Bulgaria to the south, Ukraine to the north, Hungary to the west, S ...

Lunar lander A lunar lander or Moon lander is a spacecraft designed to land on the surface of the Moon. As of 2021, the Apollo Lunar Module is the only lunar lander to have ever been used in human spaceflight, completing six lunar landings from 1969 to 19 ...

. It was being developed by ARCA, as an entrant for the

Google Lunar X Prize The Google Lunar XPRIZE (GLXP), sometimes referred to as Moon 2.0, was a 2007–2018 inducement prize space competition organized by the X Prize Foundation, and sponsored by Google. The challenge called for privately funded teams to be th ...

, until it was cancelled in 2014. It was intended to have a mass of 400 kilograms when fully fueled, including two

upper stage A multistage rocket or step rocket is a launch vehicle that uses two or more rocket ''stages'', each of which contains its own engines and propellant. A ''tandem'' or ''serial'' stage is mounted on top of another stage; a ''parallel'' stage is ...

s to propel it from

low Earth orbit A low Earth orbit (LEO) is an orbit around Earth with a period of 128 minutes or less (making at least 11.25 orbits per day) and an eccentricity less than 0.25. Most of the artificial objects in outer space are in LEO, with an altitude never mor ...

onto a trajectory towards the

Moon The Moon is Earth's only natural satellite. It is the fifth largest satellite in the Solar System and the largest and most massive relative to its parent planet, with a diameter about one-quarter that of Earth (comparable to the width of ...

. The lander itself had a

monopropellant Monopropellants are propellants consisting of chemicals that release energy through exothermic chemical decomposition. The molecular bond energy of the monopropellant is released usually through use of a catalyst. This can be contrasted with biprop ...

cold rocket engine, fuelled by

hydrogen peroxide Hydrogen peroxide is a chemical compound with the formula . In its pure form, it is a very pale blue liquid that is slightly more viscous than water. It is used as an oxidizer, bleaching agent, and antiseptic, usually as a dilute solution (3%� ...

, which was to slow its descent towards the surface of the Moon. The target landing site was

Montes Carpatus Montes Carpatus is a mountain range that forms the southern edge of the Mare Imbrium on the Moon. The selenographic coordinates of this range are 14.5° N, 24.4° W, and the formation has an overall diameter of . They were named by astronomer J ...

. The spacecraft was designed to travel 500 metres after landing, in order to explore its landing site. ELL was the part of the spacecraft to land on the Moon, while ELE was the complete spacecraft, including the two stages intended to propel it from low Earth orbit to a trans-lunar trajectory.

References

External links

ELE Official Site
{{Use British English, date=January 2014 Google Lunar X Prize Cancelled space probes Missions to the Moon Space program of Romania ARCAspace