645 search results for “stars” in the Public website
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Tuning in to star-planet interactions at radio wavelengths
PhD defence
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Telescopes
The Old Observatory houses four historical telescopes. On this page you can learn more about them.
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Ingredients of the planet-formation puzzle
High-angular-resolution observations of the circumstellar material have uncovered numerous and very diverse substructures in protoplanetary discs, raising the question of whether they are caused by forming planets or other mechanisms.
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Non-equilibrium chemistry and cooling in simulations of galaxy formation
Promotor: J. Schaye
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Tracing the journey of the sun and the solar siblings through the Milky Way
Supervisor: S.F. Portegies Zwart Co-Supervisor: A.G.A. Brown
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The colours of the extreme universe
This thesis presents pioneering work on the panchromatic emission of some of the most luminous galaxies in the early Universe: star forming galaxies and active galactic nuclei.
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Predicting the future: Predictive control for astronomical adaptive optics
The field of exoplanet research is rapidly advancing through the development of new technology, observing techniques, and post-processing methods.
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Shining Light on Interstellar Matter
Promotor: H.V.J. Linnartz
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Tuning in to the feedback bassline: revealing the operation of AGNs in galaxy clusters with high-resolution radio observations
Following the Big Bang, structure in the Universe started collapsing under the force of gravity. This resulted in the formation of the first stars, galaxies and clusters of galaxies.
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Linking simple molecules to grain evolution across planet-forming disks
Planets are formed in disks of gas and dust around young stars.
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Galactic substructures as tracers of dark matter and stellar evolution
One of the most important puzzles in modern astrophysics is the nature of dark matter.
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A radio view of dust-obscured star formation
PhD defence
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Staring at stardust
Dust particles in space form the basis for new stars and planets. But what do these particles consist of and how do they behave? Sascha Zeegers studied this. PhD defence 1 November.
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Award for finding the most extreme stellar object in the Universe
Joseph Callingham from the Leiden Observatory receives the Louise Webster Prize for outstanding post-doctoral research. The prize is awarded by the Astronomical Society of Australia for Callingham’s search for the most extreme object in the Universe.
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Education highlights 2023
From educational adventures in the tropics, students building software for real customers, to bacteria that degrade plastics. Scroll through our highlights on educational innovation and the achievements of our students.
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To the edge of space and time
Large telescopes can look so deep into the Universe that they can also look back billions of years in time. From 2018, the successor of the Hubble Space Telescope, the James Webb Space Telescope, will be able to see the period just after the Big Bang, when the first stars and galaxies formed. Astronomers…
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From molecules to planets: Exploring the chemical heritage of solar systems
Walsh
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Interstellar Catalysts and the PAH universe
Organic molecules in interstellar space are important as they influence the structure of galaxies and star formations. Studying catalytic processes in space allows us to understand how molecular species are formed and chemically evolved in the interstellar medium and solar system objects.
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When galaxy clusters collide: the impact of merger shocks on cluster gas and galaxy evolution
Promotor: Prof.dr. H.J.A. Rottgering, Co-promotor: David Sobral
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Painting with starlight : optical techniques for the high-contrast imaging of exoplanets
This thesis describes the development and validation of new high-contrast imaging techniques, with the ultimate goal of enabling the next generation of instruments for ELT-class telescopes to directly image Earth-like extra-solar planets orbiting around nearby stars.
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Young suns and infant planets: Probing the origins of solar systems
Even though more than 4000 extra-solar planets are known today, only a small fraction of these has been captured in an image. To better understand the planet formation mechanisms in solar-like environments we started the Young Suns Exoplanet Survey (YSES).
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The formation of complex organic molecules in dense clouds-Sweet results from laboratory
Large areas of space are filled by molecular clouds that consist of gas and dust grains that are the remnants of dead stars. When these clouds start collapsing, the decreasing temperature and increasing density cause gas particles to start accreting onto dust grain surfaces.
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Metals in the diffuse gas around high-redshift galaxies
Promotores: Prof.dr. J. Schaye & Prof.dr. C. Steidel (California Institute of Technology)
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Unlocking the chemistry of the heavens
How are the building blocks of life formed?
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Narrative and Belief
How do religious narratives persuade their readers to believe their message? And how can it be that some readers even come to treat fantasy and science fiction as authoritative religious texts? These are the core questions treated in Markus Davidsen’s new book Narrative and Belief: The Religious Affordance…
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Reactivity on interstellar ice analogues
The
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Experiment Square
Are you the scientist of the future? Come experiment with science at the Experiments Square! Make your own slime, discover how rubber can count, play along with the antibiotics game, discover the power of light and much more!
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Structure and substructure in the stellar halo of the Milky Way
Promotor: K.H. Kuijken
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From grains to planetesimals: the microphysics of dust coagulation
Promotor: Prof.dr. A.G.G.M. Tielens, Prof.dr. C. Dominik (UvA)
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Staring at the heavens: Astronomy in medieval Islam
University Lecturer Ahab Bdaiwi:
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Far From Home: The science exploitation of the fastest milky way stars
PhD defence
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Unknown Past: Leila Murad, the Jewish-Muslim Star of Egypt
Lecture, LUCIS What's New?! Series
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Galaxy in the early Universe contains carbon after all
In 2015, Jorryt Matthee thought he discovered an extremely distant galaxy called CR7, which lacked elements heavier than helium. Three years later, he shows with measurements using the ALMA telescope that the galaxy does have carbon after all, and even in normal concentrations. The American Astronomical…
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The Gaia telescope: mapping 1 billion stars with 1 billion pixels
Lecture, Kaiser Lente Lezing
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Bridging the gap between physics and chemistry in early stages of star formation
PhD defence
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The effects of birth environment of a star on its planetary system
PhD defence
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About us
Leiden Observatory is the astronomical institute of the Faculty of Science of Leiden University.
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A piece of the Universe in the computer
Simulations of galaxies help researchers understand astronomical observations better. The EAGLE simulation, a large project in which Leiden astronomers play a leading role, shows the evolution of the Universe, from just after the Big Bang to the present day.
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From supernovae to galaxy clusters: observing the chemical enrichment in the hot intra-cluster medium
Promotor: Jelle S. Kaastra Co-promotor: Jelle de Plaa
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Lasers, lenses and light curves: adaptive optics microscopy and peculiar transiting exoplanets
Promotores: Prof.dr. C.U. Keller, Prof.dr. H.C. Gerritsen
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Creating a sustainable Humanities Campus
During the development of the Humanities Campus, as many 'green choices' as possibile are being made. This concerns the buildings as well as the surrounding area. Making the campus more sustainable is measured using the BREAAM.NL method.
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JWG Leiden
The Jeugdwerkgroep is a national astronomy association for young people who are interested in astronomy. The Leiden section organizes a monthly meeting in the Old Observatory Leiden.
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Chaotic dynamics in N-body systems
Promotor: Prof.dr. S.F. Portegies Zwart, Co-promotor: D.C. Heggie
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Inextricable ties between chemical complexity and dynamics of embedded protostellar regions
Promotor: E. F. van Dishoeck, Co-promotor: C. Walsh
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Buddhist Astrology and Astral Magic in the Tang Dynasty
Jeffrey Kotyk defended his thesis on 7 September 2017
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Clues from stellar catastrophes
Promotores: S.F. Portegies Zwart, E. M. Rossi
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Shaping Massive Galaxies: the structural evolution of galaxies across
Galaxies in the local Universe fall into two main categories of spirals and ellipticals. In this Thesis, we explore the structural evolution of galaxies into this bimodal distribution.
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Rosemary's Baby
Rosemary's Baby is one of the greatest movies of the late 1960s and one of the best of all horror movies, an outstanding modern Gothic tale. An art-house fable and an elegant popular entertainment, it finds its home on the cusp between a cinema of sentiment and one of sensation.
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Mind the gap: gas and dust in planet-forming disks
Promotores: Prof.dr. E.F. van Dishoeck, Prof.dr. C.P. Dullemond
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Women and Girls in Science Day
How many stars are there in the Universe? And how can astronauts float in space? These and many other questions about astronomy will be answered at Leiden University on Saturday 9 February.