97 search results for “SATELLITE ORBITS” in the Staff website
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learning-based NO2 estimation from seagoing ships using TROPOMI/S5P satellite data
PhD defence
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Starlink - Battles of the satellites
You can hardly avoid it if you want to quickly implement satellite internet. Elon Musk's company Starlink is "all-powerful in space" (Volkskrant). Dutch newspaper de Volkskrant wrote an extensive article on the situation and the possible dangers and alternatives. For this, they interviewed several experts,…
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Satellite conference IFLA 2023 - Empire, Indigeneity, and colonial heritage collections: confronting difficult pasts, enabling just futures
The IFLA-Section Rare Books and Special Collections committee and the Indigenous Matters Section, in collaboration with Leiden University Libraries (UBL) organize a satellite conference in Leiden – Friday August 18th and Saturday August 19th – prior to the IFLA World Library and Information Congress…
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Report: The Optimisation of the Use of Satellite Information in the Humanitarian Domain: Legal and Space-Related Developments
In February 2023, the International Institute of Air and Space Law and the Kalshoven-Gieskes Forum for International Humanitarian Law organised a seminar on the topic of 'The optimisation of the use of satellite information in the humanitarian domain – Legal and space-related developments' at Leiden…
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Space debris after Russian missile test: 'Totally irresponsible'
Russia recently blew up a defect satellite. As a result, the amount of space debris in Earth orbit has increased.
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First fine for space debris: A warning for space companies
The first fine for space debris has been issued. An American company that had failed to clean up its space junk has been fined $150.000.
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Satellite Remote Sensing of Plant Functional Diversity
PhD defence
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Satellite conference IFLA 2023 - Empire, Indigeneity, and colonial heritage collections: confronting difficult pasts, enabling just futures
Satellite conference
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Webb data suggest potential atmosphere around rocky exoplanet
Researchers using NASA’s James Webb Space Telescope may have detected atmospheric gases surrounding 55 Cancri e, a hot rocky exoplanet 41 light-years from Earth. This is the best evidence to date for the existence of any rocky planet atmosphere outside our solar system.
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Radio astronomers bypass disturbing Earth's atmosphere with new calibration technique
An international team of researchers led by astronomers from Leiden University (the Netherlands) has produced the first sharp radio maps of the universe at low frequencies. Thanks to a new calibration technique, they bypassed the disturbances of the Earth's ionosphere. They used the new method to study…
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What to archive?
Start thinking in advance about the selection for long-term preservation.
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Motion of stars near Milky Way's central black hole is only predictable for few hundred years
The orbits of 27 stars orbiting closely around the black hole at the center of our Milky Way are very chaotic. As a result, researchers cannot predict with confidence where they will be in about 462 years. ‘That is astonishingly short,’ says astronomer Simon Portegies Zwart who collaborated on the r…
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IIASL present at launch of sustainability initiative Net Zero Space
On Friday 12 November 2021, the Net Zero Space initiative was launched at the Paris Peace Forum. The International Institute of Air and Space Law (IIASL) of Leiden University is one of the first supporters to the initiative.
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Planet found too big for its parent star
The discovery of a planet far too large for its sun defies models about the formation of solar systems and planets. In a paper in Science, researchers, including Yamila Miguel of Leiden Observatory, report the discovery of a planet more than 13 times heavier than Earth orbiting the ultracool dwarf star…
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Tanja Masson-Zwaan: 'Regular near-collisions in space'
Satellites belonging to American space company SpaceX recently came very close to a Chinese space station. Experts are calling for traffic management rules in space.
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Tanja Masson-Zwaan: 'We have to protect our heritage on the moon, like Neil Armstrong’s footprints'
Space is becoming increasingly busier due to the launching of satellites and tourists. But no binding international agreements have been made since 1979. This is problematic, warns space lawyer Tanja Masson-Zwaan. ‘Everyone’s putting their own interests first.’
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Mapping the universe with a NWO grant of 3.1 million
With the new Euclid satellite, scientists are going to map a large part of the sky. The satellite ofthe European Space Agency (ESA) will soon give them a better view of the galaxies and matter in the universe. Professor of Galactic Astronomy Koen Kuijken and a team of Dutch scientists are receiving…
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European Commission selects IIASL to study Space Traffic Management
The European Commission has selected a consortium of major European launcher and satellite manufacturers, operators and service providers, as well as policy and legal research centres and institutes to study and provide guidelines and recommendations on Space Traffic Management (STM). The IIASL of Leiden…
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Tanja Masson-Zwaan: Still no obligation to clear up space debris
Space travel has long since progressed from being just about rockets, travelling to the moon, and Russia and America. The Netherlands has its own Space Agency and one of its important tasks is collecting and making available increasingly advanced satellite data.
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Meet archaeologist Tuna Kalayci: ‘How can we integrate robots into archaeology?’
In the course of 2020 the Faculty of Archaeology was bolstered by some new staff members. Due to the coronavirus situation, sadly, this went for a large part unnoticed. In a series of interviews we are catching up, giving the floor to our new colleagues. We kick off with Dr Tuna Kalayci, who joined…
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Scientists discover the largest stellar black hole in the Milky Way
A European team of astronomers has discovered the largest stellar black hole in the Milky Way. It is more than thirty times as massive as our sun and is located in the constellation of Aquila, about two thousand light-years from Earth. The astronomers stumbled upon the black hole by chance while preparing…
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Archaeological explorations in Jordan unveil traces of ancient caravan routes
Systematic aerial surveys carried out in Jordan’s Eastern Badia region since 1998 and about 10 years of simplified satellite image analysis have led to the discovery of multiple prehistoric sites, according to archaeologist Peter Akkermans. The Jordan Times interviewed him about the new insights.
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Tanja Masson-Zwaan: Climate agreement for space not realistic
During a working visit to a company that cleans up space debris, the British Prince Charles suggested that a climate agreement specifically for space might be a good idea. Experts, including Leiden Law School’s Tanja Masson-Zwaan, say the idea is wishful thinking.
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Asteroid named after Emeritus Professor Corrie Bakels: 'I revolve around the sun in 5.5 years'
Corrie Bakels is known as one of the founders of bio-archaeology in the Netherlands. One of her former students, Dr Marco Langbroek, active in astronomy, made a request to the International Astronomic Union to name a recently discovered asteroid after her. Hearing the news, Bakels was astounded. 'My…
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Astronomers find missing link for origin of water in solar systems
An international team of astronomers, including astronomers from Leiden University, has found the missing link in the path taken by water through star-forming clouds and young stars to comets and planets. They did so with the help of the ALMA observatory in Chile. The researchers published their findings…
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Honorary doctorate for Canadian-American astrophysicist Sara Seager
Leiden University will confer an honorary doctorate on astrophysicist Sara Seager for her work on exoplanets.
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Finding the origin of giant black holes
‘Space Antenna LISA will open an unprecedented window on the Universe,’ says astronomer Elena Maria Rossi. The mission will be the first one to detect Gravitational Waves from space. These can tell us more about the beginning of our Universe and the formation of black holes. With an NWO grant of twelve…
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After the launch of the next big space mission: ‘This is a big step towards understanding dark matter and dark energy.’
Henk Hoekstra and Alessandra Silvestri work on the astronomy and theoretical physics in the Euclid mission. These Dutch researchers are part of the mission.
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ESOF session shines a light on the dark side of our universe
Cosmologists can measure with increasing precision how the universe is expanding and changing. This is producing unexpected results and causing cracks in our picture of the universe. At the ESOF session The Dark Side of our Mysterious Universe, cosmologists, astronomers and philosophers will discuss…
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Diplomacy may look very different in space than on Earth
A symposium on space diplomacy for experts and the general public will take place in The Hague on Monday 12 June. Everyone has an interest in learning more about this topic, says Professor Jan Melissen. ‘The scope of international relations has expanded beyond our planet.’
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Jasper’s Day
On January 1st Jasper Knoester started as our new dean. How is he finding it? What kinds of things is he doing and what does his day look like? In each newsletter Jasper gives a peek into his life as dean.
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What global cities are made of
Understanding what our buildings and cities are made of is an important step in making them more sustainable. Industrial ecologist Tomer Fishman (CML) has received an ERC Starting Grant to map the construction materials used in buildings in the Global South. 'Without the data, you can't formulate po…
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Tanja Masson-Zwaan on crowds on the moon: can anyone simply go there?
It has been a coming and going of satellites and spaceships near the moon. It has not been this busy in years. There are currently more than ten moon missions in progress and another five are being scheduled for next year.
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Tanja Masson-Zwaan: 'Rules in space are to everyone’s advantage'
Space is of enormous strategic value. Having rules in space therefore is to everyone’s advantage.
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Open day at space research institute at Leiden Bio Science Park
SRON, the Netherlands Institute for Space Research, is holding an open day on Sunday 25 September. It has had a branch at the Leiden Bio Science Park since 2021 and works closely with Leiden University.
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Steps to take before business travel abroad
Organisation
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Gaia data maps globular cluster, gravitational lensing and asteroids with great precision
The European Space Agency (ESA) has published an interim data release from Gaia, the space telescope mapping out the Milky Way in 3D. The first scientific papers published today reveal half a million stars in the Omega Centauri globular cluster, nearly 400 candidate gravitational lensers and the positions…
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Dust cloud from two colliding ice planets dims light of parent star
For the first time, an international group of astronomers have seen the heat glow of two ice giant planets colliding. They could also observe the resultant dust cloud move in front of the parent star several years later. Led by Leiden astronomer Matthew Kenworthy, they monitored the star's brightness…
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Spinoza Prize for astrophysicist Ignas Snellen
With his clever measuring methods Ignas Snellen – together with his team – was the first to detect carbon monoxide in the atmosphere of exoplanets. For his pioneering work the Leiden astrophysicist has been awarded the Spinoza Prize, the highest academic honour in the Netherlands. The prize of 2.5 million…
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Surprise: No methane on the night side of exoplanet WASP-43b
The night side of exoplanet WASP-43b, to the surprise of astronomers, does not appear to contain methane. It is likely that extreme winds do not allow enough time for methane to form in detectable amounts. This is the conclusion of an international team of scientists, with Leiden and Amsterdam contributions,…
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Life cycle of comets near other star resembles that of our solar system
The life cycle of comets near the star Beta Pictoris is similar to that of comets in our own solar system. This is the conclusion of a team of astronomers from the Netherlands, France and Brazil. It seems that, just like in our own solar system, there are fewer comets as the star gets older. The researchers,…
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Tanja Masson-Zwaan over de gevolgen van de oorlog in Oekraïne voor de ruimtevaart
Wereldwijd worden veel samenwerkingsverbanden met Rusland stopgezet vanwege de oorlog in Oekraïne. Hoe zit dat met de ruimtevaart, waar de Russen ook een groot aandeel in hebben?
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Surprising molecule helps detect protoplanets
A team of scientists, including Leiden Astronomer Alice Booth, has discovered silicon monosulfide molecules in the dust disk around a young star. Such molecules indicate planet formation. The team made the discovery using the ALMA telescopes. This method provides an alternative when direct observation…
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Artificial microswimmers work together like bacteria
Microscopic swimmers such as bacteria do not always swim alone. There are advantages to exchanging information and cooperating. Stefania Ketzetzi and colleagues now show in Nature Communications that human-made microswimmers, too, can cooperate.
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What do we define as urban green space?
When do we define a piece of nature in the city as a park? And when is something a tree or shrub? It may seem obvious, but in scientific literature the definitions vary quite a bit. That makes comparisons difficult. Environmental scientist Joeri Morpurgo looked at the differences and designed a general…
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Measuring water with your smartphone
You might take photos and selfies with your phone's camera, or scan a QR code. But there is much more you can do with it. Astronomer Olivier Burggraaff developed a phone attachment that allows you to take measurements of surface water with your smartphone. He will receive his PhD on 13 December.
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Are tropical forests threatened by democracy?
Democracy may lead to more deforestation in the tropics. So write environmental scientist Joeri Morpurgo and his colleagues in the prominent scientific journal Biological conservation. They found that competitive elections are associated with more loss of tropical rainforest than elections without competition.…
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Quinten Meertens nominated for Christiaan Huygens Science Prize 2021
Is it acceptable for an algorithm to make mistakes? Quinten Meertens investigated this at Leiden University and the UvA and has been nominated with his research for the prestigious Christiaan Huygens Science Prize. The winner will be announced on 11 October. In April, Meertens received his doctorate…
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Sustainability and energy: AI research in Leiden, Delft and Rotterdam
From energy transition to the nitrogen crisis: artificial intelligence can be of great help. Researchers from the three universities in Zuid-Holland are seizing the opportunity. Three of them talk about collaborative research in the AI for Energy and Sustainability focus group within the Zuid-Holland…
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The archaeology of face masks: ‘Face masks layers will be a huge help for future archaeologists’
From one year to the next, face masks have started to appear in the environment. As the masks are discarded, they end up in the top soil, in sediment layers, and in refuse heaps. In a couple of generations archaeologists will study the layer that has already been labeled the Face Mask Horizon. Current…