Tuesday, 26 October 2010
- Earth's only natural satellite.
- Quarter the diameter of Earth.
- 1/81 of the mass of the Earth.
- The moon is in synchronous rotation with Earth & always shows the same face.
- It is the brightest object in the sky after the Sun.
- The Moon's gravitational influence produces the ocean tides.
- The Moon's appearance in the sky is the same size as the Sun which means that the Moon covers the Sun precisely during total solar eclipses.
- The moon is thought to have formed ~ 4.5 billion years ago in a giant impact event involving Earth.
- The Moon remains, under the Outer Space Treaty which means it is free to all nations to explore for peaceful purposes.
- There have been 6 manned lunar landings of the moon between 1969 & 1972.
- The first manned moon landing was Apollo 11 in 1969.
Tuesday, 12 October 2010
Planet Sizes (Largest To Smallest):
- Jupiter - (diameter = 142,800 km)
- Saturn - (diameter = 120,660 km)
- Uranus - (diameter = 51,118 km)
- Neptune - (diameter -= 49,528 km)
- Earth - (diameter = 12,756 km)
- Venus - (diameter = 12,104 km)
- Mars - (diameter = 6787 km)
- Mercury - (diameter = 4879.4 km)
- Pluto (dwarf planet) - (diameter = 2300 km)
See Related Posts:
Image: from Wikipedia, Farry
Wednesday, 16 June 2010
Wednesday, 2 June 2010
Artists impression of Star Formation in the Early Universe (less than 1 billion years old) by artist Adolf Schaller.
"The deepest views of the cosmos from the Hubble Space Telescope (HST) yield clues that the very first stars may have burst into the universe as brilliantly and spectacularly as a firework finale."
Preliminary interpretation of the deepest views from the HST suggest that the universe made a significant portion of its stars in a massive firestorm of star birth. This likely happened a few billion years after the "big bang".
Science Credit: NASA and K. Lanzetta (SUNY). Artwork Credit: Adolf Schaller for STScI.
Click on image for larger version (3000 x 2400)
NASA Public Domain
Adolf Schaller - Big Bang - Deep Space - Early Universe - HST - Hubble Space Telescope -NASA - Star Birth - Star Formation - Universe
Posted by ALCHEssMIST & Alchemipedia.
Monday, 20 July 2009
Moon Landing Live Transmission:
Today is the 4oth anniversary of the Apollo 11 first manned mission to land on the moon. One of the first truly global events in history.
The 3 historic astronauts on the NASA Apollo 11 mission were:
- Mission Commander Neil Alden Armstrong
- Command Module Pilot Michael Collins
- Lunar Module Pilot Edwin Eugene 'Buzz' Aldrin, Jr
Neil Armstrong (left) - Michael Collins (center) - Buzz Aldrin (right)
Armstrong followed by Aldrin became the first men to land on the moon, whilst Collins remained in the orbiting Command Module.
After stepping onto the lunar surface Armstrong made the now famous line:
"That's one small step for man, one giant leap for mankind"