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Messier 2 or M2 (also designated NGC 7089) is a globular cluster in the constellation Aquarius, five degrees north of the star Beta Aquarii. It was discovered by Jean-Dominique Maraldi in 1746, and is one of the largest known globular clusters.
In astronomy, coordinate systems are used for specifying positions of celestial objects (satellites, planets, stars, galaxies, etc.) relative to a given reference frame, based on physical reference points available to a situated observer (e.g. the true horizon and north to an observer on Earth's surface). [1]
A stellar stream is an association of stars orbiting a galaxy. It was once a globular cluster or dwarf galaxy that has now been torn apart and stretched out along its orbit by tidal forces. [ 1 ] An exception in the list about Milky Way streams given below is the Magellanic Stream, composed of gas (mostly hydrogen), although in 2023 a ...
Watch a livestream above, with coverage set to start around 8:15 am ET. The actual launch, which will take place in the West Texas desert outside El Paso, is scheduled for 9 am.
The poles of astronomical bodies are determined based on their axis of rotation in relation to the celestial poles of the celestial sphere. Astronomical bodies include stars, planets, dwarf planets and small Solar System bodies such as comets and minor planets (e.g., asteroids), as well as natural satellites and minor-planet moons.
The Helmi Stream is a stellar stream of the Milky Way galaxy. It started as a dwarf galaxy, now absorbed by the Milky Way as a stream. It was discovered in 1999, is formed of old stars deficient in heavy elements, and has a mass of 10 to 100 million solar masses. It was absorbed by the Milky Way some 6 to 9 billion years ago. [1]
A mission launching this year will carry a simple 4G network to the Moon, helping to lay the building blocks for long-term human presence on other planets. Streaming and texting on the Moon: Nokia ...
Gaia is a space observatory of the European Space Agency (ESA), launched in 2013 and expected to operate until Spring 2025. The spacecraft is designed for astrometry: measuring the positions, distances and motions of stars with unprecedented precision, [6] [7] and the positions of exoplanets by measuring attributes about the stars they orbit such as their apparent magnitude and color. [8]