What if a spacecraft could cycle between Earth and Moon orbits, performing multiple circuits of each, naturally and indefinitely, with zero propulsion? We’ve discovered a new class of stable, prograde, low-energy cycler orbits that do just that. Why these orbits matter: Ballistic → fuel-free Stable → long-term ready Near-chaotic → agile with low ΔV Low-energy → access to Earth/Moon, Lagrange points, Sun–Earth L1/L2, even heliocentric space At the AAS/AIAA Astrodynamics Specialist Conference in Boston next week, I’ll present on a new family of ballistic Earth-Moon cycler orbits that are stable, prograde, and mission agile—unlike any cyclers in the current literature. The example below is shown in both the Earth-Moon rotating frame and inertial frame. Conference Paper: ross.aoe.vt.edu/papers/ross-…

Study calculus. not because exams exist. because reality moves. • derivatives → how things change • integrals → how change accumulates • limits → what happens at the edge • gradients → where systems want to go • differential equations → how nature evolves motion, heat, fluids, control, optimization, robotics, ML. all of it speaks calculus. without it, you see outputs. with it, you see dynamics.

Go USA 🇺🇸

Very interesting approach. Required UV dose depends on the pathogen, but could be tuned, depending on the crop.

They did it. SpaceX has now launched more satellites than the rest of humanity, combined, all time.

You’ve heard of the Interplanetary Superhighway and the Atmospheric Superhighway, but are you prepared for the Underground Fungal Superhighway?

Merge this idea with ocean current-based search protocols using TRAPs nature.com/articles/s41467-0… @JavierGRocha @Mattia__Serra

Captured by Anduril's network of 400 telescopes deployed around the globe: The second stage of the Falcon Heavy launch of ViaSat 3-F3 performing a routine thrust event. This produced a spiraled-shaped plume effect, a nominal part of operations for a successful launch of Viasat's latest satellite.

If I was standing on the equator of that neutron star, would I feel the motion of 0.24c? Oh wait! The extreme gravity gradient would destroy me in a fraction of a rotation. I’d feel that alright.

Saint-Malo, Brittany, has one of the highest tides in Europe, with water that can rise 13 m over. These houses are built as a sea wall and 4 layer glass on the front windows. [📹 Easy Ride]

I’ve heard California has difficulty with math

Bowls and Pringles お椀とプリングルス [Math short write-up] notion.so/kyndinfo/Bowls-and…

Don’t worry Massachusetts. Virginia’s got your back.

New tracking on a classic old video of an immune cell hunting down and engulfing bacteria

🚀 Space exploration timeline: 1903 — Tsiolkovsky publishes the rocket equation 1904 1905 1906 1907 1908 1909 — Goddard writes first paper on liquid propellants as fuel for rockets 1910 1911 1912 1913 1914 — Goddard patents designs for a liquid-fueled rocket and a multi-stage rocket 1915 1916 1917 1918 1919 — Goddard publishes "A Method of Reaching Extreme Altitudes" 1920 1921 — Goddard begins experiments with liquid oxygen and gasoline rocket engines 1922 1923 — Goddard successfully tests first liquid propellant engine 1924 1925 1926 — Goddard launches world's first liquid-fueled rocket 1927 — VfR (Society for Space Travel) founded in Germany; von Braun joins as a teenager 1928 1929 — Goddard launches rocket carrying first scientific payload (barometer & camera) 1930 1931 — Korolev co-founds GIRD (Group for Study of Reactive Motion) in Moscow 1932 — Von Braun becomes chief engineer of German Army rocket program 1933 — Korolev leads launch of USSR's first liquid-fueled rocket 1934 — Von Braun's A-2 rockets reach 2.4 km altitude 1935 1936 — Korolev designs RP-318, USSR's first rocket-powered aircraft 1937 1938 1939 — Von Braun's A-5 rocket reaches 8 km altitude 1940 1941 1942 — Von Braun's A-4 (V-2) rocket becomes first human-made object to reach space (100 km) 1943 — V-2 production begins; JPL formally established in USA 1944 — V-2 used as weapon against London and Antwerp; first ballistic missile attacks in history 1945 — USA recruits von Braun 1946 — USA and USSR independently begin reverse-engineering V-2 1947 — First animals (fruit flies) launched to space aboard a V-2 1948 — Korolev's R-1 rocket successfully launched 1949 — Albert II, a rhesus monkey, becomes first mammal in space aboard a US V-2 rocket 1950 1951 1952 1953 — Korolev begins design of R-7 1954 — Korolev writes letter to Moscow advocating for an orbital satellite program 1955 — USA announces Project Vanguard 1956 — Von Braun's Redstone rocket successfully tested; R-7 development nears completion 1957 — Korolev's R-7 becomes world's first ICBM; Sputnik 1 — first artificial satellite in orbit; Sputnik 2 carries Laika — first living creature in orbit 1958 — USA launches Explorer 1; NASA founded; first US attempt at Moon probe (Pioneer 0) fails 1959 — Luna 1 (USSR) — first spacecraft to escape Earth's gravity; Luna 2 — first human-made object to reach the Moon; Luna 3 — first photos of Moon's far side 1960 — First weather satellite (TIROS-1) launched by USA; first communications satellite (Echo 1); two Soviet dogs (Belka & Strelka) orbit Earth and return safely 1961 — Gagarin — first human in space, April 12; Alan Shepard — first American in space, May 5 1962 — Mariner 2 — first spacecraft to fly by another planet (Venus); Telstar 1 — first active communications satellite 1963 — Tereshkova — first woman in space 1964 — Ranger 7 — first close-up photographs of the Moon's surface 1965 — Leonov — first spacewalk; Mariner 4 — first close-up images of Mars 1966 — Luna 9 — first soft landing on the Moon; first orbital docking (Gemini 8); Surveyor 1 — first US soft Moon landing 1967 — Apollo 1 fire kills three astronauts; Venera 4 — first probe to enter another planet's atmosphere (Venus) 1968 — Apollo 8 — first crewed mission to orbit the Moon; famous Earthrise photograph 1969 — Apollo 11 — first humans on the Moon; Apollo 12 — second Moon landing 1970 — Apollo 13 — Moon mission aborted after explosion; Luna 16 — first robotic Moon sample return; Lunokhod 1 — first lunar rover 1971 — Salyut 1 (USSR) — first space station; Mariner 9 — first spacecraft to orbit another planet (Mars); Apollo 14 & 15 Moon landings 1972 — Apollo 16 & 17 — final Moon landings; Pioneer 10 launched toward Jupiter; last humans on the Moon 1973 — Pioneer 10 — first spacecraft to fly by Jupiter; Skylab — first US space station 1974 — Mariner 10 — first gravity assist maneuver; first flyby of Mercury

A Hamiltonian system is a way of describing motion where position and momentum evolve together as one coupled system. The plot shows an energy landscape in phase space, with the motion of the system traced directly on top of it and projected onto the underlying phase portrait. #HamiltonianSystems #PhaseSpace #PhysicsSimulation #DynamicalSystems #MathematicalPhysics

The death blips labeled

NASA was so groovy