Who Discovered Mercury

The Solar System’s smallest and innermost planet is Mercury, named after the messenger and god of trade in Roman mythology (also known as Hermes in Greek mythology). Being the innermost planet, probing and observing Mercury is difficult, although it has been done. In fact, Mercury is actually part of the five classical planets, together with Venus, Mars, Jupiter, and Saturn. This means that during the ancient times, people already knew it existed (since they were visible from the Earth).

Since Mercury is a classical planet, it isn’t possible to know who discovered the planet. There are people, of course, who made serious probes and discoveries regarding the planet. The earliest recorded document was made by a Babylonian astrologer and possibly written by an Assyrian astronomer. The Greeks, seeing the planet during the morning and evening sky, had a name for it. It was called Apollo during the morning and Hermes at night. However, they did not know the two stars were actually just one object. It was later during the 4th century that the Greeks discovered that Apollo and Hermes were the same.

The name could be attributed to the Romans, who named the planet after the messenger god due to its visibility (it can only be seen during very short periods). Of course, the penultimate observation was that of Galileo Galilee, who proved the claim of Nicolas Copernicus regarding the classical planets. It was actually the French philosopher Pierre Gassendi who saw the planet in transit, as Galileo’s telescope wasn’t strong enough to see as far as Mercury (he only saw Mercury, in part, when he observed Venus).

39 Responses to “ Who Discovered Mercury ”

  1. isabella

    this is sorta helpful

  2. TODD



    This was kinda helpful but it doesn’t tell me who discovered mercury….so i will give you an A-…..BYE.

  4. escliey d. ruiz

    it makes me hung on the sky,, it didnt tell specifically who really discovered planet mercury

  5. athena

    this helped only cuz mercury wasnt offical by who “called” on it…
    so best guess is Galileo cuz he was the first person to see it with a telescope

  6. chiweeny

    not very helpful

  7. Izaylah Moreno

    Did not help me at all!!!! I need some answers

  8. fdsafdsaffds

    it doesn’t say who discovered mercury

  9. Kasi

    well in helped a little at least it gave me a little info for my project

  10. jalah

    really it actually did tell who,french philosopher Pierre Gassendi. context clues people!

  11. danielle torchorn


  12. kieran

    this was kinda helpful i guess…. still didnt tell me thought! >:

  13. chelle

    it was very vague as far the information. but for the facts I needed such as who discovered the planet and when it did not give clear facts. if you’re trying to go in depth with your research this website will not help.

  14. dissapointed

    this website sucks! it didn’t help AT ALL!!

  15. Jennie

    WHO discovered Murcury? Don’t tell! Who is in the picture?

  16. randomness

    this website help me enough for my project and the text did say there was no official
    person who discovered mercury so good job on the website!

  17. loco

    does anyone know who discovered it?????????????

  18. dekilah too tall

    This did NOt Help Me With My Project.! Who Dicovered Mercury Thats All I Wanna Know.!

  19. Coopieboy

    I love Mercury and laxin! i can’t wait till we can live on Mercury and eat some mac and cheese in the jag and we can go Laxin!!!


    heheheheheheheheheheheheheheh :D

  20. Bella! >.

    Pshhh… yea rit.. i doesn’t say..!! oh i got an even better one! oh and coopieboy!, i can’t belive that u luv mercury!! and i will come to it if u live there! :) xP

  21. izaak

    mercury is pretty small

  22. xoxo

    stop complaining its useful

  23. IWasJustLookingFotWhoDiscoveredMercury

    This was okay, enough for an elementary project, but if you want some real answers, this isnt the website you should look at. Interesting facts on the Greeks, though.

  24. thara

    waste. guys do you know who discovered mercury

  25. morgan


  26. Chloe

    Cool! But do you know who discovered MERCURY!!!!!!!!!!!!!!!!!!!!!

  27. flamingwing12


  28. [S]eriously?


    (WHO discovered Mercury? I agree with the fine man down there l)

  29. I TOLD YOU SO!

    who discovered it? :{

  30. riztys

    Copernicus then Galileo confirmed it. ;)

  31. Jithin rocks

    good work

  32. Man of the left sea

    I was like wat but then i came yo out my wanker lake of it in front of my eyes and on my keys lol

  33. Hella

    This is not helpful at all sorry but i will give it 0 out of 10

  34. noemi

    really helpful thx. aplus

  35. false name

    the title says who discovered mercury but it doesn’t say who really discovered it.

  36. runtstash

    haha its hermes god of messengars

  37. Maddy

    this will help me with my project

  38. Edward Grant

    The Person In the Picture Is Nicholas Copernicus So Thats Him PERSON REVEALED !
    THERE im 9 yrs old and i know that. no offence.

  39. Edward Grant

    Im sorry the people who discovered Mercury was Johann Galle and Hendrich D’ Arrest. ):