Some meteorites that fell to Earth relatively recently may have contained liquid water within the past million years. This means space rocks might have delivered water to our planet's surface throughout its history rather than just very early on. Many scientists suspect that meteorites once brought water to Earth. But previous analysis of the rocks suggests the chemical reactions inside them that involve liquid water ceased billions of years ago. So there was a question mark over whether they lost their water long ago.
A small 110-pound vehicle will travel to celestial bodies by 2020, with the intent to mine for ice water, building materials, and precious metals. Designed by Deep Space Industries, Prospector-1 is set to carryout the first commercial mining mission beyond our planet's orbit by flying to near-Earth asteroids. This mission is an important step in the firm's overall plans to harvest and supply in-space resources to support the growing space economy. A small 110-pound vehicle will travel to celestial bodies by 2020, with the intent to mine for ice water, building materials and precious metals. Designed by Deep Space Industries, Prospector-1 is set to carryout the first commercial mining mission beyond our planet's orbit by flying to near-Earth asteroid Prospector-1 is the brainchild of Deep Space Industries (DSI).
If all the matter in the universe suddenly disappeared, would space still exist? Space, he imagined, was something like Star Trek's holodeck, a 3-dimensional virtual-reality grid onto which simulated people and places and things are projected. As Newton put it in the early pages of his Principia: "Absolute space, of its own nature, without reference to anything external, always remains homogeneous and immovable." 1
Earth is now the warmest it's been in some 120,000 years. Eighteen of the last 19 years have been the warmest on record. And concentrations of carbon dioxide -- a potent greenhouse gas -- are likely the highest they've been in 15 million years. The consequences of such a globally-disrupted climate are many, and it's understandably difficult to keep track. To help, here's a list of climate-relevant news that has transpired in 2019, from historically unprecedented disappearances of ice, to flood-ravaged cities.
Earth is seen in this image taken by NASA's JunoCam as it flew by Earth, using its gravity to get a boost needed to reach Jupiter on October 9, 2013, in this NASA handout image released to Reuters. Humans are responsible for some of the wobble in Earth's spin. Since 1899, the Earth's axis of spin has shifted about 34 feet. Now, research quantifies the reasons why and finds that a third is due to melting ice and rising sea levels, particularly in Greenland -- placing the blame on the doorstep of anthropogenic climate change. Another third of the wobble is due to land masses expanding upward as the glaciers retreat and lighten their load.