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R211 (New York City Subway car) – Wikipedia

The R211 is a future new technology (NTT) New York City Subway car to be built by Kawasaki Heavy Industries for the B Division and the Staten Island Railway (SIR). They will replace all remaining R32, R44 (SIR), and R46 subway cars. The order is split into three parts: R211A and R211T cars for the subway and R211S cars for the SIR. The R211Ts will employ open gangways between cars, a feature not present on current rolling stock. The base order consists of 535 cars, with options for up to 1,077 additional cars.

Source: R211 (New York City Subway car) – Wikipedia

These will replace the oldest cars in the system on the A, etc.

previously

Transiting Exoplanet Survey Satellite unique P/2 orbit

The Unique Orbit of NASA’s Newest Planet HunterNASA’s Transiting Exoplanet Survey Satellite – TESS will fly in an orbit that completes two circuits around the Earth every time the Moon orbits. This special orbit will allow TESS’s cameras to monitor each patch of sky continuously from nearly a month at a time. To get into this orbit, TESS will make a series of loops culminating in a lunar gravitational-assist, which will give it the push it needs. TESS will reach its orbit about 60 days after launch.Music: “Drive to Succeed” from Killer TracksComplete transcript available.Watch this video on the NASA Goddard YouTube channel.

Source: GMS: TESS Shorts

wikipedia