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10 hours ago · This article compares different orbital launcher families (launchers which are significantly different from other members of the same 'family' have separate entries). The article is organized into two tables: the first contains a list of currently active and under-development launcher families, while the second contains a list of retired ...
10 hours ago · After S-IC separation, the S-II second stage burned for 6 minutes and propelled the craft to 109 miles (175 km) and 15,647 mph (25,181 km/h), close to orbital velocity. [35] For the first two uncrewed launches, eight solid-fuel ullage motors ignited for four seconds to accelerate the S-II stage, followed by the ignition of the five J-2 engines.
- $185 million in 1969–1971 dollars ($1.23 billion in 2019 value).
- 13 (Apollo: 12 Skylab: 1)
- 3
10 hours ago · Orbital kinetic energy of the International Space Station (417 tonnes at 7.7 km/s) 6.3×10 13 J: Yield of the Little Boy atomic bomb dropped on Hiroshima in World War II (15 kilotons) 9×10 13 J: Theoretical total mass–energy of 1 gram of matter (25 GW·h) 10 14 1.8×10 14 J
10 hours ago · Chandra X-ray Observatory: Combined Sunyaev–Zeldovich effect and Chandra X-ray observations of galaxy clusters. Adjusted uncertainty in table from Planck Collaboration 2013. 2003 72 ± 5: WMAP (First year) only . 2001-05 72 ± 8: Hubble Space Telescope Key Project
10 hours ago · 5 pm – shorter X-ray wavelengths (approx.) 10 picometres. To help compare different orders of magnitude this section lists lengths between 10 −11 and 10 −10 m (10 pm and 100 pm). 25 pm – approximate radius of a helium atom, the smallest neutral atom; 30.8568 pm – 1 rontoparsec; 50 pm – radius of a hydrogen atom
May 22, 2024 · Calculation of orbits of members of the solar system started early but was hampered by the idea of a static Earth. In modern times, Copernicus first suggested that the Earth actually moves round the Sun. Galileo’s discovery of the Jovian satellites played an important role in general acceptance of the heliocentric system; it later also allowed the first measurement of the velocity of light.
10 hours ago · Pluto (minor-planet designation: 134340 Pluto) is a dwarf planet in the Kuiper belt, a ring of bodies beyond the orbit of Neptune.It is the ninth-largest and tenth-most-massive known object to directly orbit the Sun.
