Overview #3

Land observor

Space observor

Direct detector

Rosetta and Philae by ESA

Rosetta was a space probe built by the European Space Agency launched on 2 March 2004. Along with Philae, its lander module, Rosetta performed a detailed study of comet 67P/Churyumov–Gerasimenko (67P).[8][9]

2.8 × 2.1 × 2.0 m central frame and aluminium honeycomb platform
~3,000 kg, which included the 100 kg (220 lb) Philae lander and 165 kg (364 lb) of science instruments
communications suite
- 2.2 m steerable high-gain parabolic dish antenna
- a 0.8 m fixed-position medium-gain antenna
- two omnidirectional low-gain antennas.[51]
two solar arrays totalling 64 square metres
- Each one was subdivided into five solar panels
- each panel being 2.25 × 2.736 m
  - individual solar cells were made of silicon, 200 μm thick, and 61.95 × 37.75 mm
maximum of approximately 1,500 watts at perihelion
minimum of 400 watts in hibernation mode at 5.2 AU
850 watts when comet operations begin at 3.4 AU
a redundant Terma power module also used in the Mars Express spacecraft,[54][55] and was stored in four 10-A·h NiCd batteries supplying 28 volts to the bus.[51]

Main propulsion comprised 24 paired bipropellant 10 N thrusters,[52] with four pairs of thrusters being used for delta-v burns.

The spacecraft carried 1,719.1 kg (3,790 lb) of propellant at launch:
- 659.6 kg of monomethylhydrazine fuel
- 1,059.5 kg of dinitrogen tetroxide oxidiser,
- contained in two 1,108-litre grade 5 titanium alloy tanks and providing delta-v of at least 2,300 metres per second (7,500 ft/s) over the course of the mission. Propellant pressurisation was provided by two 68-litre (15 imp gal; 18 US gal) high-pressure helium tanks.[56]
https://en.wikipedia.org/wiki/Rosetta_(spacecraft)
- https://en.wikipedia.org/wiki/Philae_(spacecraft)