Search results
Results from the WOW.Com Content Network
These satellites were the first celestial objects that were confirmed to orbit an object other than the Sun or Earth. Galileo saw Io and Europa as a single point of light on 7 January 1610; they were seen as separate bodies the following night. [11] Callisto: Jupiter IV o: 8 January 1610 p: 13 March 1610 Io: Jupiter I Europa: Jupiter II 1650s
The principal change was to space leap years differently so as to make the average calendar year 365.2425 days long, more closely approximating the 365.2422-day 'tropical' or 'solar' year that is determined by the Earth's revolution around the Sun. The reform advanced the date by 10 days: Thursday 4 October 1582 was followed by Friday 15 ...
The Orbiting Frog Otolith (OFO) was a NASA space program which sent two bullfrogs into orbit on November 9, 1970, for the study of weightlessness. The name, derived through common use, was a functional description of the biological experiment carried by the satellite.
The Hubble Space Telescope, the first large optical telescope in orbit, is launched using the Space Shuttle, but astronomers soon discovered that it is crippled by a problem with its mirror. A complex repair mission in 1993 allows the telescope to start producing spectacular images of distant stars, nebulae, and galaxies.
In 1868 Jules Janssen and Norman Lockyer discovered a new element in the Sun unknown on Earth, helium, which currently comprises 23.8% of the mass in the solar photosphere. [34] As of today, spectroscopes are an important tool to know about the chemical composition of the celestial bodies.
They’d discovered a new species: Scinax juruena, or the Juruena snouted tree frog. Juruena snouted tree frogs are considered “small,” reaching just over 1 inch in length, researchers said.
Some frogs found in South and Central America have the rare ability to turn on and off their nearly transparent appearance, researchers report Thursday, Dec. 22, 2022, in the journal Science ...
This is why the later discovered bodies were also named accordingly. Two more bodies that were discovered later, and considered planets when discovered, are still generally considered planets now: Uranus, discovered by William Herschel in 1781; Neptune, discovered by Johann Gottfried Galle in 1846 (based on prediction by Urbain Le Verrier)