On this section of the website you can find more information about the Old Observatory and the current astronomy research institute.

With each discovery that is made, the universe reveals a fraction of its secrets: the most distant galaxies and quasars, the atmosphere of exoplanets, evidence of dark matter, complex molecules in space. This is what fills the days and nights of the researchers from the Leiden Observatory and their…

The Old Observatory of Leiden is the oldest surviving university observatory in the world. While students of Leiden University receive lectures in the main part of the building, the visitor center in the basement and the telescopes on the building serve the general public. Here you will find information…

The Old Observatory is still used intensively as a university building. Yet there is still plenty to see and experience in this beautiful monument. Find out what the possibilities are here.

Every month there is an opportunity to visit the Old Observatory in the evening. These open evenings consist of a lecture followed by a visit to the telescopes in the building.

Four different astronomical societies are active in the Old Observatory. We are very proud of the commitment these associations show to organize activities.

The Leiden Children's Rights Observatory is an open access online database of case commentaries, written by international experts on children’s rights, referring to the decisions of the UN Committee on the Rights of the Child under the Optional Protocol to the Convention on the Rights of the Child on…

From molecule, to cell, to organism. The high-level drug research at the Cell Observatory aimes at reducing the spread of cancer and developing new medicines for tuberculosis.

Whether finding signals of dark matter or discovering hydrogen in the vicinity of exoplanets, Leiden astronomers are world players in their field, and they are part of a long tradition: Leiden was the first university in the world to have its own observatory.

A new website has been designed to make the Leiden Children’s Rights Observatory, which started in 2018, more accessible.

Last week, the Old Observatory Leiden concluded its participation in Stage 1 of the DOORS Incubation Programme. Our team has spent the last three months learning about how to successfully implement digital practices into their work to improve our audience engagement. The workshops introduced important…

After nearly 70 years, the Leiden Observatory has a new telescope. A crowdfunding action in March brought in the 20,000 euros required to build a solar telescope. On 19 September Rector Magnificus Carel Stolker officiated at the opening.

With the necessary measures, researchers restart their work in various laboratories. The Leiden Cell Observatory is one of the places where scientists resume their lab work.

Yesterday marked the start of the National Accessibility Week. How accessible is Leiden University for people with a disability? We asked Lucia Langerak, disabled herself and working at the Honours Academy, about her experiences: ‘Significant improvements are being made.’

From Mexico and Indonesia to China and Italy: people from all over the world read about the Leiden Observatory publication on the birthplace of comets. This research suggests that all comets in our solar system might come from the same place: a specific range in the flat disk of dust and gas that once…

How big is the universe? How do stars form and evolve? And does life exist elsewhere in the Universe? These main questions in astronomy are the themes of the new exhibition Above & Beyond, which was created in honour of the hundredth anniversary of the International Astronomical Union (IAU). The exhibition…

The European ARTificial Intelligence Lab is now offering artists working with Artificial Intelligence the chance for a residency at the Leiden Observatory and the Ars Electronica Futurelab. Entries are possible until 22 July 2020

Staring into the clouds hoping for a glimpse of the sun, cheering in encouragement, video recordings: there was no shortage of things to do at the Leiden Observatory. More than 600 visitors witnessed the last, almost complete solar eclipse of the decade..

Announcement

The Klokhuis dedicates a special episode to Leiden alumnus and famous scientist Christiaan Huygens. Part of the episode was recorded at the Leiden Observatory. Leiden researchers also helped shape the episode, which debuts on Tuesday 2 November.

The case note examines the recent inquiry report published by the UN Committee on the Rights of the Child.

This summer, the Universe is closer than ever. With the online astronomy summer programme Space in Your Living Room!, the Leiden Observatory brings astronauts and Leiden astronomers to the homes of children all across Europe.

Two radio telescopes in Green Bank, West Virginia have brought together a few remarkable people. A new photo exhibition in the Old Observatory visitor centre gives an insight into the remote community. Due to the corona crisis, the Observatory is not open to the public. That’s why we’ve selected a few…

The European Commission has officially established Euro-BioImaging – which provides life scientists with open access to a broad range of technologies and resources in biological and biomedical imaging – as a European Research Infrastructure Consortium (ERIC). The Cell Observatory in Leiden is part of…

On 16 May the first International Day of Light was celebrated all around the globe. Initiated by UNESCO, organisations in 87 different countries set up a total of more than 600 events to embrace the vital role of light and related technologies in science. In the Old Observatory in Leiden visitors could…

The winter season is almost here and so is the end of our exhibition More-than-Planet. From 1 November, you can only visit us with exclusive guided tours. During this tour, you will visit one of our historical telescopes and we will take you through the More-than-Planet exhibition.

On 16 May the first International Day of Light was celebrated all around the globe. Initiated by UNESCO, organisations in 87 different countries set up a total of more than 600 events to embrace the vital role of light and related technologies in science. In the Old Observatory in Leiden visitors could…

A logical next step and a new challenge: Harold Linnartz is ready for his new position as Programme Director (PD) of the Leiden Observatory. He will follow up current PD Paul van der Werf on 1 October. 'The programme has grown tremendously. That will be a logistics tour de force.'

As of 16 August Ignas Snellen is the new Scientific Director of the astronomical institute of the Faculty of Science. He will succeed Huub Rottgering, who led the institute since 2012. Snellen has been appointed for a period of four years.

Every week, Uwe Hensch walks past the Old Observatory in Leiden. In corona times, he decided to make a LEGO design of the historic building. His design is now finished and might go into production. You can help to make it happen.

On Sunday 29 October the annual open day of the Old Observatory will take place. During this day, people can visit the Old Observatory for free and enjoy the historic building.

A new report on admissibility under the Optional Protocol to the UN Convention on the Rights of the Child (CRC) on a Communications Procedure (OP3) has been published.

How to create an unforgettable astronomy experience for tourists? And how to create fun activities that also have scientific and educational value? The Astronomy & Society Group at Leiden Observatory has translated a manual that answers those questions. The Observatory’s public engagement team hopes…

The Children’s Rights Observatory is pleased to launch the Spanish version of the website. This new feature of the website is a result of the partnership between Leiden Law School and the Center for Constitutional Studies of the Mexican Supreme Court (CEC-SCJN).

The case note examines the recent views adopted by the UN Committee on the Rights of the Child on a communication against Belgium.

Open Dag

Festival

Festival

Lecture

Symposium

Symposium

Artist Daan Roosegaarde, together with UNESCO and Leiden University, wants to make the stars come out during Seeing Stars Leiden. The University will therefore switch off the lights in most of its buildings on Sunday 25 September from 22:00 to 23:30 and is asking the people of Leiden to follow suit.