What 3 fact about when a planet or star was discovered , by whom & with what technology?

Answer 1

Fact 1: The sun was discovered 35,007 years ago.
Fact 2: It was discovered by Carl Sagan.
Fact 3: Using his eyes.

Answer 2

Catherine, your question is ambiguous. It is difficult to tell what you are asking.
Which star are you talking about? Most of the brighter stars have been known about since before history was recorded and no one really knows who those people were. It is safe to say that the technology was nothing more than their naked eyes.

Some of the more recent stars that are relatively dim were discovered either by telescope or by spectroscope Telescope allow you to see dimmer stars, and spectroscopes allow you to tell when something that appears as a single star may in fact be two or more stars.
For the most part the discoverers are any number of astronomers and astrophysicists whose names are only found in some obscure notebook somewhere to indicate that they were the first person to make an observational entry about that particular star.
The planets Venus, Mercury, Mars., Jupiter and Saturn have a similar story in that they have been known about for so long that no one really knows when or where they were discovered, much less by whom. Uranus and Neptune, however, were discoverd by telescope and are recently enough discovered that you should be able to google that on your own. The same would go for some of the other interstellar planets that have been discovered by spectroscopes.