Evidence suggests ancient civilizations, including the Greeks, may have had early optical knowledge and devices like ...

An event called a "ring plane crossing" will occur between Saturn and Earth on March 23, 2025, when Saturn's rings will ...

Skywatchers on Thursday evening, Feb. 6, will notice an eye-catching pairing-off between two of the brightest objects in the ...

February brings a rare planetary parade, with five bright planets in clear view and a special alignment of Mercury and Saturn ...

A hundred years ago, astronomer Edwin Hubble dramatically expanded the size of the known universe. At a meeting of the ...

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A hundred years ago, astronomer Edwin Hubble dramatically expanded the size of the known universe. At a meeting of the American Astronomical Society in January 1925, a paper read by one of his ...

Hubble’s work opened the door to the study ... Nature of the nebulae In 1610, astronomer Galileo Galilei used the newly invented telescope to show that the Milky Way was composed of a huge ...

The ELT, under construction near Mount Armazones, is set to be the world’s largest visible-light telescope. It will feature a 39.3-meter-wide mirror and is expected to expand our understanding ...

The journey of astronomical telescopes began in the early 17th century when Galileo Galilei crafted his first refracting telescope in 1609. Although not the inventor of the telescope, Galileo was the ...