Latest Terrestrial planets Stories

Earth's Massive Extinction: The Story Gets Worse
2012-01-08 05:31:32

New finding on mercury-volcanic link could re-write history on past annihilations Scientists have uncovered a lot about the Earth´s greatest extinction event that took place 250 million years ago when rapid climate change wiped out nearly all marine species and a majority of those on land. Now, they have discovered a new culprit likely involved in the annihilation: an influx of mercury into the eco-system. “No one had ever looked to see if mercury was a potential culprit....

Image 1 - First Ever Direct Measurement Of The Earth's Rotation
2011-12-23 05:35:03

Pinpointing the orientation of the Earth's axis using the world's most stable ring laser The Earth wobbles. Like a spinning top touched in mid-spin, its rotational axis fluctuates in relation to space. This is partly caused by gravitation from the sun and the moon. At the same time, the Earth's rotational axis constantly changes relative to the Earth's surface. On the one hand, this is caused by variation in atmospheric pressure, ocean loading and wind. These elements combine in an effect...

Water On Mars Could Mean The Planet Is Habitable
2011-12-12 09:01:24

Scientists from the Australian National University have found that “large regions” of the Red Planet could actually sustain terrestrial life. The results are based on the scientists´ findings that extensive regions of the sub-surface of Mars could contain water and be at comfortable enough temperatures to support at least microbial life. In the study -- An Extensive Phase Space for the Potential Martian Biosphere -- published today in the Astrobiology Journal,...

Mysterious Object Floating Past Mercury?
2011-12-09 05:28:46

A NASA telescope has revealed a gigantic object the size of a planet floating around Mercury, leading some to believe it could be a UFO. The object appears in a video sequence of images of a coronal ejection from the Sun.  As a flare crosses Mercury, a huge round object appears next to it. YouTube user siniXster, who uploaded the video, says in his commentary that he believes it is a ship. "It's cylindrical on either side and has a shape in the middle. It definitely looks like a...

Dawn Reveals Vesta's 'Color Palette'
2011-12-07 05:46:54

[ Watch the Video ] Vesta appears in a splendid rainbow-colored palette in new images obtained by NASA's Dawn spacecraft. The colors, assigned by scientists to show different rock or mineral types, reveal Vesta to be a world of many varied, well-separated layers and ingredients. Vesta is unique among asteroids visited by spacecraft to date in having such wide variation, supporting the notion that it is transitional between the terrestrial planets -- like Earth, Mercury, Mars and Venus --...

Earth's Core Deprived Of Oxygen
2011-11-24 04:57:19

The composition of the Earth's core remains a mystery. Scientists know that the liquid outer core consists mainly of iron, but it is believed that small amounts of some other elements are present as well. Oxygen is the most abundant element in the planet, so it is not unreasonable to expect oxygen might be one of the dominant "light elements" in the core. However, new research from a team including Carnegie's Yingwei Fei shows that oxygen does not have a major presence in the outer core. This...

NASA Extends MESSENGER Mission
2011-11-15 04:32:52

NASA has announced that it will extend the MESSENGER mission for an additional year of orbital operations at Mercury beyond the planned end of the primary mission on March 17, 2012. The MESSENGER probe became the first spacecraft to orbit the innermost planet on March 18, 2011. "We are still ironing out the funding details, but we are pleased to be able to support the continued exploration of Mercury," said NASA MESSENGER Program Scientist Ed Grayzeck, who made the announcement on November...

New Model May Explain Magnetized Moon Rocks
2011-11-10 06:06:46

A team of scientists has proposed a novel model for the generation of a global magnetic field in the ancient moon, something that could help solve a decades-old mystery about the presence of magnetized rocks on the moon´s surface. Since the moon currently has no global magnetic field, these rocks have puzzled experts since the days of the Apollo program. The Earth´s magnetic field exists because it has a spinning solid core surrounded by hot metallic liquid, which churns...

Image 1 - Strange Hollows Discovered On Mercury
2011-10-25 04:10:27

[ Watch the Video ] NASA's MESSENGER spacecraft has discovered strange hollows on the surface of Mercury. Images taken from orbit reveal thousands of peculiar depressions at a variety of longitudes and latitudes, ranging in size from 60 feet to over a mile across and 60 to 120 feet deep. No one knows how they got there. "These hollows were a major surprise," says David Blewett, science team member from the Johns Hopkins University Applied Physics Laboratory. "We've been thinking of...

Spacecraft Helps Discover Ozone Layer On Venus
2011-10-06 09:31:01

[ Watch the Video ] The European Space Agency's Venus Express spacecraft has discovered an ozone layer in the atmosphere of Venus. The spacecraft made the discovery while watching stars from the edge of the planet seen through its atmosphere. SPICAV, an instrument aboard Venus Express, analyzed the starlight and found characteristic fingerprints of gases in the atmosphere as they absorbed light. ESA said the ozone was detectable because it absorbed some of the ultraviolet from the...

Latest Terrestrial planets Reference Libraries

2004-10-19 04:45:42

Terrestrial Planet -- A terrestrial planet is a planet that is mostly composed of silicate rocks and may or may not have a relatively thin atmosphere. The term is derived from the Greek word for Earth, so an alternate definition would be those planets that are more Earth-like than not. Terrestrial planets are very different from gas giants, which may or may not have solid surfaces and are composed mostly of hydrogen and helium in various physical states. Only one terrestrial planet,...

2004-10-19 04:45:40

The Planet Venus is the second planet from the sun. It is often called the evening star or morning star and is brighter than any object in the sky except the sun and the moon. Because its orbit lies between the sun and the orbit of the earth, Venus passes through phases like those of the moon, varying from a large bright crescent when the planet is near inferior conjunction (nearest the earth) to a smaller silvery disk when it is at superior conjunction (farthest from the earth). Since...

2004-10-19 04:45:40

The Planet Mercury -- in astronomy, nearest planet to the sun, at a mean distance of 36 million mi (58 million km); its period of revolution is 88 days. Mercury passes through phases similar to those of the moon as it completes each revolution about the sun, although the visible disk varies in size with respect to its distance from the earth. Because its greatest elongation is 28, it is seen only for a short time after sunset or before sunrise. Since observation of Mercury is...

2004-10-19 04:45:40

The Planet Mars -- in astronomy, 4th planet from the sun, with an orbit next in order beyond that of the earth. Physical Characteristics Mars has a striking red appearance, and in its most favorable position for viewing, when it is opposite the sun, it is twice as bright as Sirius, the brightest star. Mars has a diameter of 4,200 mi (6,800 km), just over half the diameter of the earth, and its mass is only 11% of the earth's mass. The planet has a very thin atmosphere consisting...

2004-10-19 04:45:40

Earth -- in geology and astronomy, fifth largest planet of the solar system and the only planet definitely known to support life. Gravitational forces have molded the earth, like all celestial bodies, into a spherical shape. However, the earth is not an exact sphere, being slightly flattened at the poles and bulging at the equator. The equatorial diameter is c.7,926 mi (12,760 km) and the polar diameter 7,900 mi (12,720 km); the circumference at the equator is c.24,830 mi (40,000 km)....

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Word of the Day
  • A murmuring sound; a rushing or whistling sound, like that of the wind; a deep sigh.
  • A gentle breeze; a waft; a breath.
  • Any rumor that engages general attention.
  • A cant or whining mode of speaking, especially in preaching or praying; the chant or recitative characteristic of the old Presbyterians in Scotland.
  • To make a rushing, whistling, or sighing sound; emit a hollow murmur; murmur or sigh like the wind.
  • To breathe in or as in sleep.
  • To utter in a whining or monotonous tone.
According to the OED, from the 16th century, this word is 'almost exclusively Scots and northern dialect until adopted in general literary use in the 19th.'