Astronomy & Astrophysics 101: Dark Energy
What Is Dark Energy? Dark energy is the name given to the as yet unknown energy source that is causing our Universe’s expansion to accelerate….
What Is Dark Energy? Dark energy is the name given to the as yet unknown energy source that is causing our Universe’s expansion to accelerate….
Astronomers will train Webb’s high-precision spectrographs on two intriguing rocky exoplanets. Imagine if Earth were much, much closer to the Sun. So close that an…
What Is a Comet? A comet is an icy, rocky mass that has passed close by the Sun within our Solar System, and has thus…
Powerful eruptions, breathtaking views across the solar poles, and a strange solar ‘hedgehog’ are among the incredible haul of spectacular images, movies, and data returned…
The subdued red tones of the globular cluster Liller 1 are partially obscured in this view by a dense scattering of piercingly blue stars. In…
ESA’s Living Planet Symposium – one of the largest Earth observation conferences in the world – is being held on May 23–27, 2022, in Bonn,…
What Is the James Webb Space Telescope? The James Webb Space Telescope is the next great space science observatory, designed to answer outstanding questions about…
On the evening of May 15, 2022, Earth passed between the Sun and the Moon blocking sunlight and casting a shadow on the lunar surface….
This glittering gathering of stars is the globular cluster NGC 6558, and it was captured by the NASA/ESA Hubble Space Telescope’s Advanced Camera for Surveys….
This spectacular, high-resolution image of the Arc de Triomphe, in Paris, was captured by Planet SkySat – a fleet of satellites that have just joined…
This is reminiscent of going down a slide on the playground – and then immediately getting back in line to go down again. Except in…
An international team of astronomers has discovered a unique object in the distant, early Universe that is a crucial link between star-forming galaxies and the…
When the Hunga Tonga-Hunga Ha‘apai volcano erupted on January 15, 2022, it sent atmospheric shock waves, sonic booms, and tsunami waves around the world. Now,…
This network of long grooves and scratches forms part of a giant fault system on Mars known as Tantalus Fossae, and is shown here as…
What Is an Elliptical Galaxy? Elliptical galaxies have an even, ellipsoidal shape. They typically contain a much greater proportion of older stars than spiral galaxies…
The tattered remnant of a supernova — a titanic explosion marking the end of the life of a dying star — is shown in this…
Get in line with ESA astronaut Matthias Maurer and his Expedition 66 crewmates to experience an orbital reboost of the International Space Station (ISS) from…
What Is Jupiter? Jupiter is the fifth planet from the Sun. It is a gas giant, and the largest and most massive planet in our…