Christopher Lemus

BU EE ‘21

[Joe Rogan Recaps @JoeRoganRecaps]

New: Joe Rogan leaves NASA astrophysicist Michelle Thaller completely stuck after asking her a deep question about the reality of time:

ROGAN: “The weirdest thing that I’ve ever heard anybody say is that all time exists currently.”

THALLER: “That’s Albert Einstein.”

ROGAN: “When we measure time what exactly are we measuring? When we create a clock that runs 24 hours per day what is it measuring?”

THALLER: “That’s a deep question. That question caused everything in physics to fall apart.”

ROGAN: “I still don’t understand what we’re measuring.”

THALLER: “I don’t think I have an answer for you. I don’t think anybody does.”

[SpaceX @SpaceX]

First full stack of Starship V3

[Elon Musk @elonmusk]

Major problem

[SpaceX @SpaceX]

The first Starship V3 has left the build site to begin prelaunch testing

[Christopher Lemus @lemusc__]

@Nord_Space How long does the print take?

[Christopher Lemus @lemusc__]

@eevblog Lots of averaging of datasets and possibly a great reconstruction algorithm

[Elon Musk @elonmusk]

For those unaware, SpaceX has already shifted focus to building a self-growing city on the Moon, as we can potentially achieve that in less than 10 years, whereas Mars would take 20+ years.

The mission of SpaceX remains the same: extend consciousness and life as we know it to the stars.

It is only possible to travel to Mars when the planets align every 26 months (six month trip time), whereas we can launch to the Moon every 10 days (2 day trip time). This means we can iterate much faster to complete a Moon city than a Mars city.

That said, SpaceX will also strive to build a Mars city and begin doing so in about 5 to 7 years, but the overriding priority is securing the future of civilization and the Moon is faster.

[Fermat's Library @fermatslibrary]

The length of the Christmas tree lights to wrap around the tree perfectly

[Massimo @Rainmaker1973]

Plasma inside the ST40 fusion reactor, filmed in color for the first time
https://t.co/W1mqqdUCSd

[Dima Zeniuk @DimaZeniuk]

SpaceX Raptor 3 engine

[Jeremy KD8TUO 🇺🇸⏦⎓⎎⎍⏚ @ElectronicsbyJH]

Just bought this at a surplus store near my house in FL 🤩 another fun thing to measure with the VNA to gain more RF experience points.

[Fang @FangSystems]

Does anyone have the CIA internal catalogue where they show bugged ethernet/RJ45 connectors for sale within the agency?

The idea is if your target uses ethernet switches, and you knew where they were being manufactured, you would intercept a delivery of RJ45 connectors to the factory and replace the original RJ45 connectors with bugged ones and tell the truck driver to not say anything, letting you sneak in bugs into your target's infrastructure.

The connectors had hidden electronics inside the PCB mount connector with a IC, data sniffer and antennae. If you had several of these bugged connectors within your target's infrastructure, they would even mesh-network together to send data out of the target back to you. The ICs would sip on just a few uA of current making them essentially impossible to detect without a complete X-ray of the bugged connector. Even with a X-ray some ethernet ports have integrated filters or ICs which would reduce the chance of the target identifying it as a bug.

I swear i saw a picture of it on 4chan a few years ago. I swear im not being a schizo

[Black Hole @konstructivizm]

Researchers at TokamakEnergy have captured for the first time a real-time, high-speed video of plasma behaviour inside their ST40 spherical tokamak, tracking visible green and red light emissions as the fusion process occurs.

[Dave Jones @eevblog]

Woah, complete Saturn V engineering documents found on microfiche?

Ping @curious_marc @DJSnM @MarcusHouse @Erdayastronaut

[Dave Jones @eevblog]

@yourfriendandy

[Mehdi @MehdiHacks]

Another RF quiz: what is this PCB artwork doing?
This one is trickier than the last!

This picture is roughly 12*18 mm.

I'll post the answer tonight.

[SpaceX @SpaceX]

Starship reenters Earth’s atmosphere on Flight 11. Data gathered from this flight will inform future Starship missions that will return to the launch site for catch and reuse

[Mehdi @MehdiHacks]

An interesting article in the Nov 2025 issue of "IEEE Microwave Magazine" walks through the design of a portable 2.4 GHz CW radar built entirely from COTS parts and an Arduino Nano.
Simple and educational; great for students and hobbyists.

[SpaceX @SpaceX]

Liftoff of Starship!

[Jeremy KD8TUO 🇺🇸⏦⎓⎎⎍⏚ @ElectronicsbyJH]

Tonight's topic in Advanced Electronic Warfare: Antenna tradeoffs.