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Royal Observatory Greenwich

#137 of 1,530 things to do in London
Certificate of Excellence
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Address: Romney Road | Greenwich, London SE10 9NF, England
Phone Number:
+44 20 8858 4422
10:00 - 17:00
Closed now
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Sun - Sat 10:00 - 17:00

The prime meridian, zero degrees longitude, runs through the courtyard of...

The prime meridian, zero degrees longitude, runs through the courtyard of the Royal Observatory in Greenwich, England, which was founded in 1675 by King Charles II.

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TripAdvisor Reviewer Highlights

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    Very good
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  • 26
Very informative

If you are interested in geography and historical scientific equipment, this is your place! A quiet walk through the observatory is self-explanatory. And also the staff, dressed... read more

4 of 5 bubblesReviewed yesterday
Vidya S
Pune, India
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2,215 Reviews from our TripAdvisor Community

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Showing 1,598: English reviews
Pune, India
Level Contributor
23 reviews
8 attraction reviews
common_n_attraction_reviews_1bd8 15 helpful votes
4 of 5 bubbles Reviewed yesterday NEW

If you are interested in geography and historical scientific equipment, this is your place! A quiet walk through the observatory is self-explanatory. And also the staff, dressed quaintly as people in the previous centuries, engage you in informative chat laced with humor.

Thank Vidya S
Nishitokyo, Japan
Level Contributor
11 reviews
6 attraction reviews
common_n_attraction_reviews_1bd8 4 helpful votes
5 of 5 bubbles Reviewed 2 days ago NEW

スペンサー伯爵家令嬢として生まれたダイアナ公妃Diana Frances, Princess of Walesは、イングランド及びスコットランド王のチャールズ2世・CharlesⅡの血を引くこととなる、そのチャールズⅡは航海術の基礎を築き恒星位置の正確な割り出しを目的にグリニッジ天文台の建造を命じた。1675年大航海時代のことであった。 1760年代にはイギリスを含むヨーロッパの海洋国々は、それぞれ独自の経度基点を定めていたが、イギリスは海洋地図やガイドなどを作成した上に正確性と実用性が高いためにグリニッジ経度は世界標準となり、このグリニッジを「本初子午線」と決定したことで、地球の反対側に国際日付変更線が定められることになった。 現在採択された「国際基準子午線・IRM」は、本初子午線からは若干離れているがしかし、IRMは地球上に固定される訳ではない。なぜならヨーロッパの全地域をカバーするユーラシアプレート毎年2.5cmのペースで北東方向に移動しているからだ。この子午線は変動し続け活きている「三つ目の子午線」とも言っていいでしょうね!   晴れた日の午前中にMBNA Thames ClippersルートRB1/RB1xでWestminsterからテムズ川を下り、陽当たりの川面がキラキラしている中、ロンドンのランドマークが次から次へと目の前を流れてゆきながら約40分Greenwich Pierに辿り着く。 町自体が世界遺産に登録されているグリニッジの港玄関から世界遺産の散策が始まる~~Welcome to Maritime Greenwich, A World Heritage Site in London~~ Greenwich Pierから5分程歩いたところに見える宮殿らしき建物は、旧王立海軍大学The Old Royal Naval Collegeです。Painted Hallと礼拝堂は見学無料で「平和と自由」の天井画、絵や彫刻などが見所です。大学を出てRomney Rdを渡ると右手に国立海洋博物館がある、こちらも入館無料です。(博物館に来る前に、道路の右に曲がるとグリニッジ・マーケットの入り口に世界の国の名物屋台が沢山並んでいて安く食べられる。)ちなみに海洋博物館の正面入り口から裏出入口(Museum Café 隣)を抜ければ天文台への近道である。グリニッジパークは毎年開催されるロンドンマラソンのスタート地点である、ここでも赤い時報球がはっきりと見えるが更に遊歩道を登って行く小高い丘の頂上に立つグリニッジ天文台からの展望は素晴らしいパノラマスクリーン!港町一望を始めロンドンの町が遠~くまで見渡せる!! 天文台の入り口に斜めに置かれた巨大な筒状のものはFriedrich Wilhelm Herschelが1781年に最大等級+5.6である天王星(Uranus;天空を踊りまわる、星散りばめたるギリシャ神話宇宙の神にちなんだ命名)を発見した際に使われた望遠鏡の解体したパーツであった。彼は34才までには、20曲以上もの協奏曲や交響曲などなどを作曲した音楽教師、オルガン奏者、指揮者である。音楽を愛し天文学に偉業を成し遂げた彼は太陽系惑星の配置と音楽理論を結び付け、太陽からの赤外線放射を発見し、のちに望遠鏡ビジネスで成功した人物でもある。 館内上のフロアにOctagonという天井の高い八角形の観測部屋にはチャールズⅡの肖像画が飾ってあった、別の部屋では18世紀に海上で使う為作られた振り子時計が展示されて、保存状態が良いこの時計にも長い物語があって…感心した。 既に天文台としての役割を終えたここには子午線だけで面白半分で来るつもりだったが、日付変更線の由来、天文学者の生涯や時計職人さん親子の偉業、大航海時代に関わるたくさんの事や歴史など、展示されたものの数だけ物語がある、それを一遍に勉強出来て、本当に遠くからロンドンに来た甲斐があったね。

Thank mississippi2016
Ulverston, United Kingdom
Level Contributor
21 reviews
7 attraction reviews
common_n_attraction_reviews_1bd8 6 helpful votes
2 of 5 bubbles Reviewed 5 days ago NEW via mobile

Having walked up the hill we thought it would be worth a look inside. It was very expensive and although they had the technology to control entry numbers it was ridiculously overcrowded, the rooms are small with very little in, but we barely saw any of it then daughter became quite overwhelmed by the crowds in the small space (not... More 

Thank Juliet C
Worthing, United Kingdom
Level Contributor
131 reviews
65 attraction reviews
common_n_attraction_reviews_1bd8 17 helpful votes
4 of 5 bubbles Reviewed 6 days ago NEW

Standing at the top of the hill in Greenwich Park, the observatory is a landmark building for many reasons both practically & historically. You can wander around parts of this for free, to enter the observatories and see the Greenwich Mean Line, there is an entry fee (reduced at present while repair work is undertaken to the Camera Obscura and... More 

Thank ZoeBailey72
London, United Kingdom
Level Contributor
27 reviews
9 attraction reviews
common_n_attraction_reviews_1bd8 12 helpful votes
4 of 5 bubbles Reviewed 6 days ago NEW via mobile

Don't get me wrong i am not scrabbling for pennies but I feel like the price was a little steep (like the hill to it) for what it was worth. Having said that it is very interesting and it is lovely to learn about the history of navigation and the ancient clocks. It may not be of interest to small... More 

Thank barude2x
Chicago, Illinois
Level Contributor
60 reviews
17 attraction reviews
common_n_attraction_reviews_1bd8 31 helpful votes
4 of 5 bubbles Reviewed 1 week ago NEW

You do need to be a bit of a history, clock, or astronomy fan, but it is fascinating. The original Harrison clocks that made it possible for ships to safely plot their longitude are on display and you can participate in a very thorough guided tour. You can also stand on the 0 longitude line and be half in the... More 

Thank Bonnie B
Level Contributor
21 reviews
6 attraction reviews
common_n_attraction_reviews_1bd8 16 helpful votes
5 of 5 bubbles Reviewed 1 week ago NEW

If your a navigation, geography of a time-keeper buff, you'll be well rewarded. The Greenwich Meridian was established here. John Harrison original marine chronometer are here in all the artistic and engineering glory.

Thank Paul L
Rio de Janeiro, RJ
Level Contributor
127 reviews
69 attraction reviews
common_n_attraction_reviews_1bd8 38 helpful votes
5 of 5 bubbles Reviewed 1 week ago NEW via mobile

If you come, you can have a quick look around, take the obligatory photo on the meridian line, and go home - or you can spend hours learning about some of the most interesting discoveries in the history of what is perhaps the oldest science. Either way, absolutely worth the trip.

Thank Hugo D
Middleham, United Kingdom
Level Contributor
4 reviews
4 attraction reviews
2 of 5 bubbles Reviewed 1 week ago via mobile

Quite pricey to get in then really not up to the standard of a lot of the free museums in the city audio tour is pretty useless

Thank RWL28021981
SamRMG, Manager at Royal Observatory Greenwich, responded to this review

Thank you for visiting us and for taking the time to pass on your feedback. We’re sorry you felt you had a bad experience, but appreciate any opportunity to improve our offer for future visitors. Your review has been passed on to our Visitor Experience team. Best wishes More 

Level Contributor
29 reviews
7 attraction reviews
common_n_attraction_reviews_1bd8 15 helpful votes
5 of 5 bubbles Reviewed 1 week ago via mobile

This is a place I have wanted to visit for years. Finally got round to it today. Amazing views over London on what was a very windy day. Loved the photography exhibits inside and the planetarium was amazing. The story teller was very inspiring to listen to. Makes you realise how small but special we humans are.

Thank Gingerjo1973

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Staying in Greenwich

Neighbourhood Profile
Greenwich Mean Time starts here, so to speak, as the very concept of global time was established at Royal Observatory, just one of several buildings of architectural interest in Greenwich. Indeed, the whole of Greenwich's historic town center, its Royal Park and a number of related buildings (and one world famous ship, the Cutty Sark) make up the UNESCO World Heritage site known as Maritime Greenwich. Today a laser beam is shot out across the night sky from the Observatory to mark the location of the Prime Meridian. Other bold (some say brash) 21st century additions to the area include landmarks such as The O2 entertainment complex (previously known as the Millennium Dome) and the Air Line cable cars, which offer scenic transport across the Thames between North Greenwich and the Royal Docks.
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