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Archive for 2019

November 11, 2019

Atlas V LVOS

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Wikipedia dicit:

Atlas V is the fifth major version in the Atlas rocket family. It is an expendable launch system originally designed by Lockheed Martin, now being operated by United Launch Alliance (ULA), a joint venture between Lockheed and Boeing.

Each Atlas V rocket consists of two main stages. The first stage is powered by a Russian RD-180 engine manufactured by RD Amross and burning kerosene and liquid oxygen. The Centaur upper stage is powered by one or two US RL10 engine(s) manufactured by Aerojet Rocketdyne and burning liquid hydrogen and liquid oxygen. AJ-60A strap-on solid rocket boosters (SRBs) are used in some configurations and will be replaced by GEM-63 SRBs in the near future. The standard payload fairings are 4 or 5 meters in diameter with various lengths.

Video Credit: ULA

 

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November 7, 2019

Cygnus Deep Space

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Northrop Grumman dicit:

The Cygnus system is a flight proven design incorporating elements drawn from Northrop Grumman and its partners’ existing, flight-proven spacecraft technologies. Cygnus consists of a service module and a pressurized cargo module. Cygnus is used to carry crew supplies, spare equipment and scientific experiments to the space station. The service module incorporates advanced avionics developed by Northrop Grumman and guidance and navigation components that allow for fully autonomous rendezvous with the space station. The avionics design fully meets all of the demanding NASA safety requirements imposed on human-rated vehicles. The pressurized cargo module is manufactured by Thales Alenia Space specifically for Cygnus.

Video Credit: Northrop Grumman

 

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November 6, 2019

Cislunar Space Habitation

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Northrop Grumman dicit:

Northrop Grumman’s vision for the next step toward human space missions to Mars employs our flight-proven Cygnus advanced maneuvering spacecraft as a human habitat in cislunar space, the region between the Moon and Earth. In the early 2020s we would launch the initial habitat on NASA’s SLS rocket. Featuring a modular design, the habitat would serve both as a destination for crewed missions and as an unmanned testbed to prove-out the technologies needed for long-duration human space missions. The habitat is also envisioned as a base for lunar missions by international partners or commercial ventures. With additional habitation and propulsion modules, the habitat could be outfitted for a Mars pathfinder mission.

Video Credit: Northrop Grumman

 

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November 5, 2019

Stainless Steel Rocket

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Copenhagen Suborbitals dicit:

The production of Spica – the largest crowdfunded, amateur space rocket has begun. After cutting all the parts for it on our homemade CNC plasma cutter and rolling the stainless steel hull we begin to weld all the pieces together for an inter tank section that will bridge the liquid oxygen and ethanol propellant tanks which will feed our DIY bi-liquid rocket engine. The world’s first crowdfunded crewed launch vehicle is on its way!

Copenhagen Suborbitals is the world’s only manned, crowdfunded space program. In the future, a volunteer astronaut will fly to space on our home-built rocket. We do this on our spare time, all the donations go to paying our workshop rent and buying materials. We are forever thankful to each of our supporters!

Video Credit: Copenhagen Suborbitals

 

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November 4, 2019

Venus — The Mysterious Planet

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Wikipedia dicit:

Venus is the second planet from the Sun. It is named after the Roman goddess of love and beauty. As the second-brightest natural object in the night sky after the Moon, Venus can cast shadows and, rarely, is visible to the naked eye in broad daylight. Venus lies within Earth’s orbit, and so never appears to venture far from the Sun, setting in the west just after dusk and rising in the east a bit before dawn. Venus orbits the Sun every 224.7 Earth days. With a rotation period of 243 Earth days, it takes longer to rotate about its axis than any planet in the Solar System and goes in the opposite direction to all but Uranus (meaning the Sun rises in the west and sets in the east). Venus does not have any natural satellites, a distinction it shares only with Mercury among planets in the Solar System.

Venus is a terrestrial planet and is sometimes called Earth’s “sister planet” because of their similar size, mass, proximity to the Sun, and bulk composition. It is radically different from Earth in other respects. It has the densest atmosphere of the four terrestrial planets, consisting of more than 96% carbon dioxide. The atmospheric pressure at the planet’s surface is 92 times that of Earth, or roughly the pressure found 900 m (3,000 ft) underwater on Earth. Venus is by far the hottest planet in the Solar System, with a mean surface temperature of 735 K (462 °C; 863 °F), even though Mercury is closer to the Sun. Venus is shrouded by an opaque layer of highly reflective clouds of sulfuric acid, preventing its surface from being seen from space in visible light. It may have had water oceans in the past, but these would have vaporized as the temperature rose due to a runaway greenhouse effect. The water has probably photodissociated, and the free hydrogen has been swept into interplanetary space by the solar wind because of the lack of a planetary magnetic field. Venus’s surface is a dry desertscape interspersed with slab-like rocks and is periodically resurfaced by volcanism.

Video Credit: NASA Goddard

 

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October 31, 2019

Lucy

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Wikipedia dicit:

Lucy is a planned NASA space probe that will tour five Jupiter trojans, asteroids which share Jupiter’s orbit around the Sun, orbiting either ahead of or behind the planet and one main belt asteroid. All target encounters will be fly-by encounters.

On 4 January 2017, Lucy was chosen, along with the Psyche mission, as NASA’s Discovery Program missions 13 and 14 respectively. The mission is named after the ‘Lucy’ hominid skeleton, because the study of Trojans could reveal the “fossils of planet formation”: materials that clumped together in the early history of the Solar System to form planets and other bodies.

Lucy is planned to launch in 2021. In 2025 it will fly by the inner main-belt asteroid 52246 Donaldjohanson, which was named for the discoverer of the Lucy hominid fossil. In 2027 it will arrive at the L4 Trojan cloud (a group of asteroids that orbits about 60° ahead of Jupiter), where it will fly by four Trojans, 3548 Eurybates, 15094 Polymele, 11351 Leucus, and 21900 Orus. After these flybys, Lucy will return to the vicinity of the Earth whereupon it will receive a gravity assist to take it to the L5 Trojan cloud (which trails about 60° behind Jupiter), where it will visit the binary Trojan 617 Patroclus with its satellite Menoetius in 2033.

Three instruments comprise the payload: a high-resolution visible imager, an optical and near-infrared imaging spectrometer and a thermal infrared spectrometer. Exploration of Jupiter Trojans is one of the high priority goals outlined in the Planetary Science Decadal Survey. Jupiter Trojans have been observed by ground-based telescopes and the Wide-field Infrared Survey Explorer to be “dark with … surfaces that reflect little sunlight”. Jupiter is 5.2 AU (780 million km; 480 million mi) from the Sun, or about five times the Earth-Sun distance. The Jupiter Trojans are at a similar distance but can be somewhat farther or closer to the Sun depending on where they are in their orbits. There may be as many Trojans as there are asteroids in the asteroid belt.

Video Credit: NASA Goddard

 

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