Lifeboat Foundation

Sustainable and responsible lunar services and transportation — yoav landsman, co-founder, moonscape.

Yoav Landsman is the Co-founder of Moonscape (https://www.moonscape.space/), a lunar services and payload transportation company, that is focused on providing necessary services like communication relay and cutting-edge imaging, while delivering payloads to the Moon.

Continue reading “Yoav Landsman, Co-Founder, Moonscape — Sustainable And Responsible Lunar Services And Transportation” »

Layers of ice and rock obviate the need for “habitable zone” and shield life against threats.

SwRI researcher theorizes worlds with underground oceans may be more conducive to life than worlds with surface oceans like Earth.

Continue reading “Worlds With Underground Oceans – Like Europa, Titan, and Enceladus – May Be More Conducive to Supporting Life Than Earth” »

Satellite imagery specialist Capella Space on Thursday released the first images captured by its two latest spacecraft launched in January.

The firm is trying to tap part of an Earth intelligence market it estimates is worth about $60 billion.

Capella’s business is based on combining a special type of imagery with a small, inexpensive spacecraft. The company is building a network of satellites that can capture images of places on Earth multiple times a day.

5 january 2020.

This paper proposes the use of Flower Constellation (FC) theory to facilitate the design of a Low Earth Orbit (LEO) slotting system to avoid collisions between compliant satellites and optimize the available space. Specifically, it proposes the use of concentric orbital shells of admissible “slots” with stacked intersecting orbits that preserve a minimum separation distance between satellites at all times. The problem is formulated in mathematical terms and three approaches are explored: random constellations, single 2D Lattice Flower Constellations (2D-LFCs), and unions of 2D-LFCs. Each approach is evaluated in terms of several metrics including capacity, Earth coverage, orbits per shell, and symmetries. In particular, capacity is evaluated for various inclinations and other parameters. Next, a rough estimate for the capacity of LEO is generated subject to certain minimum separation and station-keeping assumptions and several trade-offs are identified to guide policy-makers interested in the adoption of a LEO slotting scheme for space traffic management.

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Japan’s space agency wants to keep the satellite’s cameras out of military hands.

An unusual geopolitical situation is brewing aboard the International Space Station. Prior to the military coup in Myanmar earlier this year, Japan’s space agency JAXA had been collaborating with the country to build microsatellites that it planned to deploy in partnership with Myanmar’s government.

Now, JAXA has no idea what to do with the pair of 50-kilogram satellites, according to SlashGear. And while Japanese scientists hope to bring the agriculture and fishery-monitoring satellites to life, they’re currently holding them on the ISS instead of deploying them out of fear they might be misused for military purposes — a striking example of real-world geopolitics spilling over into space.

Continue reading “Satellites Are Stranded on the ISS Because of a Military Coup” »

WASHINGTON — A Falcon 9 launched another set of Starlink satellites March 14, with the rocket’s first stage setting a record with its ninth launch and landing.

The Falcon 9 lifted off from Launch Complex 39A at the Kennedy Space Center at 6:01 a.m. Eastern. The upper stage deployed its payload of 60 Starlink satellites into orbit 65 minutes later, bringing the size of the broadband internet constellation to 1260 satellites.

The launch was the eighth for the Falcon 9 this year, and took place a little more than 72 hours after another Falcon 9 launch of Starlink satellites. Six of the eight Falcon 9 launches this year have been dedicated to Starlink, and one of the other two, the Transporter-1 dedicated rideshare flight, also carried 10 Starlink satellites.

Elon Musk’s SpaceX is preparing to further expand testing of its Starlink satellite internet in a test for the U.S. Air Force, an FCC request revealed.

Elon Musk’s SpaceX is preparing to further test its Starlink satellite internet in a demonstration for the U.S. Air Force, the company revealed in a recent request to the Federal Communications Commission.

“SpaceX seeks to make minor modifications to its experimental authorization for additional test activities undertaken with the federal government,” the company wrote to the FCC in a filing on Thursday.

Continue reading “SpaceX prepares for Air Force test connecting an aircraft to its Starlink satellite internet” »

Primordial magnetic fields (PMFs), being present before the epoch of cosmic recombination, induce small-scale baryonic density fluctuations. These inhomogeneities lead to an inhomogeneous recombination process that alters the peaks and heights of the large-scale anisotropies of the cosmic microwave background (CMB) radiation. Utilizing numerical compressible MHD calculations and a Monte Carlo Markov chain analysis, which compares calculated CMB anisotropies with those observed by the WMAP and Planck satellites, we derive limits on the magnitude of putative PMFs. We find that the total remaining present day field, integrated over all scales, cannot exceed 47 pG for scale-invariant PMFs and 8.9 pG for PMFs with a violet Batchelor spectrum at 95% confidence level.

SpaceX has launched 1265 Starlinks to date with another 60 awaiting launch this weekend. Thousands more are planned.