Conferència: Rellotges de sol a Catalunya (duard Farré)

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Conferència: Rellotges de sol a Catalunya. Un recorregut pels rellotges de sol més interessants que tenim a la nostra geografia tant des del punt de vista tècnic com històric i artístic. A càrrec Eduard Farré, Llicenciat en Humanitats

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35-year data record charts sea-temperature change

Warming seas

Four trillion satellite measurements, taken over four decades from 1981 to 2018, have been merged to create a continuous global record that will help to understand the science behind Earth’s climate.

A paper published recently in Nature Scientific Data describes how this new dataset of global sea-surface temperature is one of the longest satellite climate data records available. The dataset will play a key role in uating global models used to predict how our oceans will influence future climate change.

Sentinel-6: charting sea level

Video: 00:05:20

In a cleanroom in Ottobrunn, Germany, the latest Copernicus Sentinel satellite is ready for final testing before it is packed up and shipped to the US for liftoff next year. Designed and built to chart changing sea level, it is the first of two identical Sentinel-6 satellites that will be launched consecutively to continue the time series of sea-level measurements. This new mission builds on heritage from previous ocean topography satellites, including the French–US Topex-Poseidon and Jason missions, previous ESA missions such as the ERS satellites, Envisat and CryoSat, as well as Copernicus Sentinel-3. With millions of people around the world at risk from rising seas, it is essential to continue measuring the changing height of the sea surface so that decision-makers are equipped to take appropriate mitigating action – as is being currently highlighted at the COP-25 Climate Change Conference in Spain.

Watch live: Nobel Prize laureates call to Space Station

Luca Parmitano and Jessica Meir

Nobel Prize laureates in physics and chemistry will talk to ESA astronaut Luca Parmitano and NASA astronaut Jessica Meir on 6 December as the Nobel Week festivities begin in Stockholm, Sweden.

Travel to Mars with Eleni Ravanis, YGT at ESA!

Eleni Ravanis

Eleni joined ESA in October 2018 to work on the Visual Monitoring Camera of Mars Express. She shares her experience from ESAC in Spain where she helps observe the red planet.

Thermal enclosure for Orion

Thermal enclosure for Orion Image:

The Orion spacecraft with European Service Module at NASA’s Plum Brook Station. The first Orion will fly farther from Earth on the Artemis I mission than any human-rated vehicle has ever flown before – but first it will undergo testing to ensure the spacecraft withstands the extremes of spaceflight.

Here at NASA’s Plum Brook Station in Ohio, USA, Orion is being put into a thermal cage in preparation of getting its first feel of space in the world’s largest thermal vacuum chamber.

Orion will be subjected to temperatures at Plum Brook ranging from –115°C to 75°C in vacuum for over two months non-stop – the same temperatures it will experience in direct sunlight or in the shadow of Earth or the Moon while flying in space.

In the picture, Orion is being placed in a cage, called the Thermal Enclosure Structure (TES), that will radiate infrared heat during the tests inside the vacuum chamber.

The tests that will be run over the next few months will show that the spacecraft works as planned and adheres to the strictest safety regulations for human spaceflight. The European Service Module has 33 thrusters, 11 km of electrical wiring, four propellant and two pressurisation tanks that all work together to supply propulsion and everything needed to keep astronauts alive far from Earth – there is no room for error.

Spiral Galaxy NGC 6744