Latest Astronomy on Mars Stories
Researchers from the Niels Bohr Institute have dated climate history for Mars for the first time.
Peak viewing conditions for the Eta Aquarid meteor shower, which occurs annually when Earth passes through the debris trail from Halley's Comet, will begin on the evening of May 5 and last until the early morning hours on May 6.
Venus's rendezvous with the Pleiades star cluster and the increasing prominence of Mars in the east-southeast part of the sky mark two of the highlights for stargazers to enjoy during the month of April.
Phobos is the larger and closer of the two natural satellites of Mars. Despite decades of Martian exploration, we still know very little about Phobos.
Earth is about to pass through a stream of debris from Halley's comet, source of the annual Orionid meteor shower.
Four bright planets are aligning in the morning sky this week.
For the seventh year in a row, the Mars Hoax is infecting email boxes around the world.
The annual Perseid meteor shower this week is predicted to be a grand event with peak viewing times Thursday night August 12 into the early pre-dawn hours Friday August 13.
People living in the northern hemisphere will be able to go out any night this week an hour after sunset and see Venus, Saturn and Mars.
Tonight's full moon will be the biggest and brightest of the year.
Positional Astronomy -- Positional astronomy is the study of the positions of celestial objects. This is the oldest branch of astronomy and dates back to antiquity. Observations of celestial objects are important for religious and astrological purposes, as well as for timekeeping. Ancient structures associated with positional astronomy include: -- Chichn Itz -- The Medicine Wheel -- The Pyramids -- Stonehenge -- The Temple of the Sun The unaided human eye can...
Perseids Meteor Shower -- Like most meteor showers, the Perseids are caused by comet debris. As comets enter the inner solar system, they are warmed by the sun and peppered by the solar wind, which produces the familar tails that stretch across the night sky when a bright comet is close to Earth. Comet tails are made of tiny pieces of ice, dust, and rock which are spewed into interplanetary space as they bubble off the comet's nucleus. When Earth encounters these particles on its...
The Moon -- The Moon is the largest satellite of the Earth, and is occasionally called Luna (Latin for moon) to distinguish it from the general use of the word "moon". The Moon is distinguished from the satellites of other planets by its initial capital letter; the other moons are described in the natural satellite article. The words moon and month come from the same Old English root word. The Moon makes a complete orbit of the celestial sphere about every four weeks. Each hour the...
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...
Mars' Moon Phobos -- in astronomy, innermost moon, or natural satellite, of Mars. Phobos orbits Mars at a distance of only 9,378 km (5,627 mi), closer to its planet than any other moon in the solar system. In fact, it is so close that the force of Mars's gravity is stronger than the force keeping the moon in its orbit, so the radius of Phobos's orbit is decreasing at the rate of about 1.8 m (about 6 ft) per century. In 40 million years, Phobos will either break apart into a ring...
- A pivoted catch designed to fall into a notch on a ratchet wheel so as to allow movement in only one direction (e.g. on a windlass or in a clock mechanism), or alternatively to move the wheel in one direction.
More Images (949 images) »