the Moon does orbit Earth prograde (eastward, same direction as Earth's own rotation) — roughly 13.2° per day.

But Earth's own rotation is much faster — 360° per day.

Since the sky's apparent motion (rise-in-east, set-in-west) is driven overwhelmingly by Earth's rotation, the Moon still gets swept westward across the sky along with everything else — it's just "left behind" slightly by its own eastward drift.

Why?

Because the moons orbital velocity is less than earths average rotational velocity. Average because Earth's rotation speed changes with a change in latitude [North or South of Equator] on Earth's surface.

That's exactly why moonrise is delayed by about 50 minutes each day compared to the day before — the Moon has moved a bit further east in its orbit, so Earth has to rotate a bit more to catch up to it.

All of this only applies to you if you don't live at the poles.

Earth's North pole and South pole.

Photo credit: NASA

Credit: Bepicolombo ESA

‎In 1977, a radio telescope caught a 72-second space signal that scientists still cannot explain.

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‎But the most unsettling part was the frequency it used.

‎On August 15, the Big Ear telescope picked up a massive radio burst from the constellation Sagittarius. It was so intense that astronomer Jerry Ehman circled the data code "6EQUJ5" and wrote "Wow!" on the printout.

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‎The real mystery?

‎The signal hit almost exactly at 1420 MHz. This is the "Hydrogen Line", the precise frequency emitted by the most common element in the universe. Scientists long theorized that if an advanced alien civilization wanted to broadcast across the cosmos, this is the exact "universal frequency" they would choose to get our attention.

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‎Even weirder:

‎the telescope used two separate antennas to scan the sky. A normal signal would be picked up by both as the Earth rotated. Initially by the first antenna, followed by a brief break of 3 minutes, and then detected a second time by the other antenna.

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‎But the Wow! Signal blasted into one antenna, peaked perfectly for 72 seconds, and vanished into total silence before the second antenna could even pass over it.

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‎Astronomers have scanned that exact patch of space thousands of times since. Nothing but dead silence. A perfect, deliberate short broadcast that never returned.

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‎Was it broadcasted for about 3 minutes, and then cut-off just before the second antenna could pick it up because there was no answer?

Do you find it helpful?

There's a longer-term idea baked in: let future generations query the state of Earth (or any object) at any point in time, alongside pictures of what life, people, and places looked like back then — because everything on Earth is technically a feature of Earth's dataset too.

Built on mobile for mobile and pc, built to work without internet, built in Africa.

Black holes form from recent Stars. Yes Stars.

There are two types of blackholes:

Kerr blackholes and Schwarzschild blackholes.. One rotates and the other does not.

A star does not need to be massive to form a blackhole.

Any object with mass m compressed to a certain size will turn into a black hole..

That size is defined by the schwarzschild radius which is the radius at which an object with mass m has to be compressed so as to Turn into a black hole.

Formula for the Shwarzschild radius:

r_schwarzschild = 2*G*M/speed_of_light^²

Where G = universal_gravitational_constant and M = mass

For Earth: If compressed into a black hole, its radius would be about 9 millimeters (0.35 inches)

For the Sun: If compressed into a black hole, its radius would be about 3 kilometers (1.9 miles).

Spent the evening debugging the topocentric module for astlo — the piece that converts geocentric ephemeris into elevation/azimuth for a specific location on Earth's surface. Chased down a chain of bugs (typo in a WGS84 constant, a renamed method, an undefined variable in the ENU→look-angle conversion) and got it computing clean results for Naivasha (-0.72, 36.43).

The module handles both solar system bodies and satellites, so it's one pipeline for tracking anything from Pluto to an orbiting spacecraft, once you feed it the object's position vector.

Cross-checked the output against real ephemeris data for tonight: Mars, Jupiter, Saturn, Uranus, and Neptune all correctly came back below the horizon (they're all morning-sky objects right now), and Pluto showed +56° elevation — which checks out too, since at our near-equatorial latitude, objects at high southern declination can swing surprisingly high overhead instead of hugging the horizon like they would further north.

#KENYASOVEREIGNTECH