Hubble Telescope Glass

The Hubble telescope was built by the United States space agency NASA with contributions from the European Space Agency. The Space Telescope Science Institute (STScI) selects Hubble's targets and processes the resulting data, while the Goddard Space Flight Center controls the spacecraft. Space telescopes were proposed as early as 1923. Hubble was funded in the 1970s with a proposed launch in...

National Geographic Asteroid Belt

The first issue of the National Geographic Magazine was published on September 22, 1888, nine months after the Society was founded. It was initially a scholarly journal sent to 165 charter members and nowadays it reaches the hands of 40 million people each month. Starting with its January 1905 publication of several full-page pictures of Tibet in 1900–01, the magazine changed from being a...

Toilet Paper Solar System Scale Model

Toilet paper, sometimes called toilet tissue in Britain, is a tissue paper product primarily used to clean the anus and surrounding area of fecal material after defecation and to clean the perineal area of urine after urination or other bodily fluid releases. It also acts as a layer of protection for the hands during these processes. It is usually supplied as a long strip of perforated paper...

Planet Earth Core

Within the first billion years of Earth's history, life appeared in the oceans and began to affect the Earth's atmosphere and surface, leading to the proliferation of anaerobic and, later, aerobic organisms. Some geological evidence indicates that life may have arisen as early as 4. 1 billion years ago. Since then, the combination of Earth's distance from the Sun, physical properties and...