Even if we accept that errors are natural to humans, why, after so many years, have they still not corrected them?

Error one

According to Rømer, light took approximately 22 minutes to cross the diameter of Earth’s orbit.

Error two

Earth–Sun distance (1 AU) light takes to travel → 11 minutes

What did Rømer actually measure: the Sun or Jupiter's moon Io?

Error three

Can't they even write properly whether it is 5:35:45 pm or 5:35:45 am?

The single most important observation (the one Rømer quoted most):

November 9, 1676: The moment Io began to disappear behind Jupiter

Actually observed time → 5:35:45 PM (Paris local time)

Expected time according to existing tables → 5:25:15 PM

Difference = +10 minutes 30 seconds (delayed)

In August 1676, when Earth was closest to Jupiter, Io's eclipses happened on time (or slightly early).

But on the same year, November 9, 1676, when Earth was farthest from Jupiter:

Expected time for Io to emerge from shadow: around 5:25 PM

Actually observed emergence time: 5:35:45 PM (Paris time)

→ Delay = about 10 minutes 45 seconds

If they wanted to confirm whether Io would appear at 5:25 or 5:35, they had to start observing Io at least 3.5 hours earlier, because the countdown starts only from the moment Io disappears; only then can the re-emergence time be measured. Looking at this, they could not have started at 2:30 in the afternoon.

Because even today it is difficult to see Jupiter at 2:30 pm in daylight; with the technology of that time, it would have been impossible to observe Jupiter's Io at 2:30 pm during the day.

From this it becomes clear that when they say 5:25 or 5:35, it cannot be evening; it must actually be early morning.

That day's sunrise was at 6:29 am.

Moreover, Ole Rømer decided to measure the time light takes to cross the diameter of Earth's orbit. Looking at this, he would have tried his observations only when Jupiter was as close as possible to the Sun (i.e., in opposition or near it), because only at those times does the light from Io cover the full diameter of Earth's orbit to reach us. Only then could he say “what I measured is the time across the full diameter of Earth's orbit.”

Look at this picture. In this image, it may appear that GS (the Sun) looks smaller than CD (Earth), but in reality, that's not the case.

Why? Because you can line up 215 Suns across the diameter of Earth's orbit. Therefore, the thickness/blocking by the Sun wouldn't be enough to reduce the size of Earth's diameter (in the way it might seem in the image).

discussion link

https://www.researchgate.net/post/Ole_Romers_discovery_is_a_historically_significant_discovery_Why_are_there_so_many_errors_in_recording_uploading_the_data_of_this_discovery

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