Comparison of star sizes 2 [eng]

How big is our Sun compared to other stars? In a spectacular and popular video highlighted on YouTube, the relative sizes of stars, planets and even the universe are shown from the smallest to the largest. The featured video begins with the Moon and progresses by showing larger moons and…

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The sky with the naked eye in June 2018

The bright stars that first appear in the evening twilight and stand out at dusk are: Capella (Alpha Aur), Castor (Alpha Gem), Pollux (Beta Gem), Regulus (Alpha Leo), Spike (Alpha Vir), Arturo (Alpha Boo), Vega (Alpha Lyr), Deneb (Alpha Cyg), Antares ( Alpha Sco) and Altair (Alpha Aql). They are…

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Hera: the European probe that must study a binary asteroid

Initially denominated AIM-Lite or AIM-D2 (Asteroid Impact Mission – Deflection Demonstration), now the proposal has been baptized like Hera (not to confuse with another European proposal of the same name to study Saturn). Hera has a mass of 640 kg and, if approved, would be launched in October 2023 or…

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Observing the Earth as if it were an exoplanet with DSCOVR

NASA’s DSCOVR satellite is a true wonder of our time that, unfortunately, goes unnoticed by most of the public. Thanks to its epic EPIC camera we can see images of the illuminated hemisphere of the Earth from 1.5 million kilometers away. But in addition to giving us spectacular images, DSCOVR…

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Contemplating the spacecraft Dragon 2 manned spacecraft

It is one of the three American manned ships that will debut in the coming years, but until now we have seen very few details. We are talking about the Dragon 2 of SpaceX, also known as Dragon V2 or Crew Dragon, the spacecraft that will take NASA astronauts to…

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They photograph a baby planet at 600 light years by chance

Astronomers led by the University of Leiden have casually found a small companion around the young double star CS Cha, while they watched the dust disk of the binary system. The finding, reported in arXiv, was produced with the SPHERE instrument at the Very Large Telescope in Chile. Soon they…

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The cargo ship " Dragon " of SpaceX returned to Earth

The unmanned “Dragon” capsule came from the International Space Station (ISS) loaded with 1,800 kilograms of equipment and returned to Earth on Saturday afternoon, SpaceX said. “Good Dragon splashdown confirmed, completing the third SpaceX refueling mission to and from the Space Station with a proven spacecraft in flight,” the Elon…

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Discovered an exiled asteroid in the periphery of the Solar System

An international team of astronomers has used ESO telescopes to investigate a relic of the primordial Solar System. The team discovered that the unusual object of the Kuiper belt, named 2004 EW95, is a carbon-rich asteroid, the first of its kind confirmed in the cold periphery of the Solar System.…

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Orbital-Hub, a European station to replace the ISS

The international space station (ISS) has its days numbered. If the member countries of the project do not change their opinion, it will cease to function after 2024. What happens next depends on many factors and there are several options on the table.

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Megafusions of ancient galaxies

An international team of astronomers has discovered massive agglomerations of galaxies that were forming and merging in the early universe, when it was only 1,400 million years old. The observations have been made with the ALMA and APEX telescopes from Chile. These are concentrations of surprisingly dense galaxies that are…

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