75 search results for “snellen” in the Public website
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Ivar SnellenISSC
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Ignas SnellenFaculty of Science
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Directorate
The directorate of Leiden Observatory consists of the Scientific Director, the Director of Education and the Director of Operations.
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Extrasolar Planet Detection Through Spatially Resolved Observations
Promotor: Prof. dr. I. Snellen, Co-Promotor: Dr. M. Kenworthy
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The Sky is Made of Lava: How lava worlds reveal their interiors through their atmospheres
Hot rocky exoplanets are planets that orbit so close to their host star that they possess a molten surface.
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Awards and Grants
Within our Faculty you may find scientists and students from the highest tier. On this page you can explore the different prizes and grants we have accumulated over the years. Ranging from sports achievements to Spinoza prizes. From ERC grants to royal distinctions. Each and every one an achievement…
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Spectroscopic characterization of exoplanets: From LOUPE to SINFONI
Over the past years it has been discovered that the population of extra-solar planets is large and diverse.
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Podcast Wetenschap op je Gemak
Wil jij meer te weten komen over wetenschappelijke onderwerpen op een gemakkelijke manier? Beluister dan deze podcast. In elke aflevering beantwoorden we samen met een wetenschapper jouw prangende wetenschapsvragen!
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High-resolution integral-field spectroscopy of exoplanets
This thesis describes the implementation and on-sky demonstration of high-resolution integral-field spectroscopy for extreme adaptive optics systems that are used to find and characterize exoplanets.
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The Evolutionary Tale of Gaseous Exoplanets
This thesis investigates the evolution and fate of gaseous exoplanets, which are continuously shaped by stellar activity across both short and long timescales.
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Modelling escaping atmospheres of highly irradiated exoplanets
Exoplanets close in to their host star receive high levels of extreme ultraviolet (EUV) irradiation, capable of heating and ultimately driving the hydrodynamic escape of their atmospheres.
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Darío González PicosFaculty of Science
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Sam de RegtFaculty of Science
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Lars Klijn -
Leiden Spinoza and Stevin Prize laureates
Of the 111 Spinoza Prizes that have been awarded since 1995, 28 have gone to researchers from Leiden University.
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Exploring strange new worlds with high-dispersion spectroscopy
Until the 1990s, the only known planets were those in our Solar System. Three decades later, several thousand exoplanets have been discovered orbiting stars other than the Sun, and substantial efforts have been made to explore these strange new worlds through spectroscopic analyses of their atmosphe…
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Tuning in to star-planet interactions at radio wavelengths
Low-mass main-sequence stars like our Sun are continuous sources of outflowing hot magnetised plasma. In the case of the Sun, this is known as the solar wind, whereas for other stars they are called stellar winds.
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Atmospheres of hot alien Worlds
Promotor: Prof.dr. I.A.G. Snellen, C.U. Keller
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Pushing the characterization of exoplanet atmospheres down to temperate rocky planets in the era of JWST
One of the key discoveries in exoplanet research over the past decade is the abundance of small planets in our Milky Way. Despite their high numbers, our understanding of their atmospheres remains limited, and it is unknown if they possess atmospheres at all.
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Spinning worlds
Promotor: I. A. G. Snellen, Co-promotor: M. A. Kenworthy
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Lava worlds: characterising atmospheres of impossible nature
Over the last three decades, the discovery of exoplanets has revealed the boundless variety of worlds beyond our own Solar System. Majority of planetary systems contain short-period planets that are larger than Earth but smaller than Neptune.
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High-contrast spectroscopy of exoplanet atmospheres
More than 5,000 exoplanets have been found over the past couple of decades. These exoplanets show a tremendous diversity, ranging from scorching hot Jupiters, common super-Earths, to widely separated super-Jupiters on the planet/brown dwarf boundary.
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Inferno Worlds
A remarkable population of short period transiting rocky exoplanets with equilibrium temperatures on the order of 2,000 K has recently been discovered.
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Don't Blink: Detecting transiting exoplanets with MASCARA
This thesis describes the Multi-site All-Sky CAmeRA (MASCARA), which consists of two small robotic telescope designed to detect exoplanets around the brightest stars in the sky.
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Richelle van CapelleveenFaculty of Science
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Leoni JanssenFaculty of Science
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Natalie GrasserFaculty of Science
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Louis SiebenalerFaculty of Science
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Isotopes and the characterization of extrasolar planets
Diverse types of exoplanets such as gas giants on close-in orbits (hot Jupiters) and young massive giants on wide orbits (super Jupiters), with no analogs in the Solar System, pose challenges but also opportunities to our understanding of planet formation and evolution.
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Awards and Grants 2022
An overview of awards and prizes granted to our staff and students in 2022, as well as special appointments at Leiden University and other institutions.
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Searching for life in the Universe
Is there extra-terrestrial life out there? It now looks as though we can sketch out an answer to this enduring question. Leiden Observatory is helping to build new instruments to find the most promising exoplanets.
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Why Leiden University?
By effectively integrating word-class scientific research in astronomy and excellent teacher education, you will become a professional astronomer with an internationally recognized MSc degree and teaching qualification.
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Christiaan van BuchemFaculty of Science
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Incentive for research on exoplanets and free will
Two Leiden scientists - Ignas Snellen and Bernhard Hommel - have been awarded an ERC Advanced Grant. The grant will fund their research over the coming five years on exoplanets and free will.
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Why Leiden University?
By effectively integrating word-class scientific research and excellent education, you will become a professional astronomer with an internationally recognized degree.
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Why Leiden University?
By effectively integrating word-class scientific research and excellent education, you will become a professional astronomer with an internationally recognized degree.
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Why Leiden University?
By effectively integrating word-class scientific research and excellent business education, you will become a professional astronomer with an internationally recognized MSc degree prepared for technological business challenges.
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Why Leiden University
The two-year Astronomy and High-Tech Innovation master’s specialisation places you at the heart of the latest astronomical discoveries, cutting-edge instrumentation, high-precision measurements, and innovative technologies in advanced instrumentation engineering. The programme is supported by researchers…
- Why Leiden University?
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Why Leiden University?
By integrating world-class scientific research and education, you will become a professional physicist with an internationally recognized degree.
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Get involved: Faculty activities
Welcome to the Leiden Science community! Throughout the year, our faculty hosts a range of events designed to bring together students and staff. From interesting lectures to lively gatherings and ceremonial milestones, there’s always something happening for you. Explore the upcoming events and make…
- Why Leiden University?
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Why Leiden University?
By effectively integrating word-class scientific research and excellent education, you will become a professional astronomer with an internationally recognized degree.
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Historical telescope returns to the Old Observatory
The Old Observatory in Leiden has reclaimed its most important telescope. Since the 1960s, the Meridian Circle (also known as a transit telescope) had been housed in the Boerhaave Museum. After more than sixty years, the telescope is finally back in its original location. Now, the public can enjoy it…
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Superstorm on exoplanet
Dutch astronomers have measured a superstorm for the first time in the atmosphere of an exoplanet, the well-studied “hot Jupiter” HD209458b. The very high-precision observations of carbon monoxide gas show that it is streaming at enormous speed from the extremely hot day side to the cooler night side…
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TOP grant for four of Leiden’s top scientists
Four scientists will receive the TOP grant for Physical Sciences from the NWO (Netherlands Organisation for Scientific Research). They are astronomer Ignas Snellen, mathematicians Tim van Erven and Charlene Kalle and computer scientist Siegfried Nijssen. The funds will be used to finance temporary research…
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Leiden planetary experts want to study seven ‘Earths’ in more detail
Astronomers have discovered seven Earth-like planets around a dwarf star in our galaxy. Three of these planets are located in the habitable zone of this star, and may contain liquid water. ‘The next step is to study the atmospheres for signs of life. In Leiden we are experts in that area,‘ says planetary…
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Dutch ‘big data’ telescope finds exoplanets
Astronomers at Leiden University have discovered the first planets using a new instrument: the planet hunter MASCARA. This instrument, developed at Leiden Observatory, looks specifically for planet transitions around the brightest stars in the sky, which surprisingly enough have so far have hardly been…
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Rare Mercury transit visible with Leiden telescope
On Monday 9 May Mercury will pass between the Earth and the Sun. This rare event can be followed in the Leiden Observatory. The Observatory's new solar telescope produces a very clear image and offers a unique opportunity to observe Mercury at the highest magnification possible in the Netherlands.
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Eyes Wide Open for MASCARA in Chile
The new MASCARA-facilty in Chile has achieved first light. This new facility will seek out transiting exoplanets as they pass in front of their bright parent stars and create a catalogue of targets for future exoplanet characterisation observations.