Astronomers have discovered thousands of exoplanets in our Milky Way galaxy using the Kepler satellite and many of them have multiple planets orbiting the host star.
By analyzing these planetary systems, researchers from the Australian National University and the Niels Bohr Institute in Copenhagen have calculated the probability for the number of stars in the Milky Way that might have planets in the habitable zone.
The calculations show that billions of the stars in the Milky Way will have one to three planets in the habitable zone, where there is the potential for liquid water and where life could exist. The results are published in the scientific journal, Monthly Notices of the Royal Astronomical Society.
The Indian Space Research Organisation (ISRO) has successfully conducted a test on Saturday Mar. 14th to check the GSLV Mk III launch vehicle’s indigenous cryogenic CE-20 engine at ISRO Propulsion Complex (IPRC) in Mahendragiri, Tirunelveli district.
“It is yet another milestone achievement on the road map of developing a bigger and more powerful indigenously built high thrust cryogenic upper stage for GSLV Mk III rocket for the Indian Space Program,” said IPRC Director D. Karthikesan. IPRC is called the "Jet Propulsion Laboratory of India" as all stage and engine related tests of ISRO's launch vehicles and satellites are carried out there.
When most people think of cosmic rings, they think of Saturn, but there are actually five bodies in our solar system known to have them. Rings of gas and dust also encircle Jupiter, Uranus, and Neptune along with a "centaur", Chariklo, an homage to the mythological Greek creature which was a hybrid of man and beast to note the unclear dual nature of small, rocky bodies that possess qualities of both asteroids and comets.
I’ve probably lost count of the number of ‘WATER ON MARS’ and related headlines I’ve read over the years. It’s an interesting case study of how a scientific theory gains support as more evidence is collected, until it becomes something ‘that is known’.
But last week we heard evidence that Mars has lost some water – an entire oceans worth in fact.
Ganymede, Jupiter's largest moon, is thought to have once had more water than all the water on Earth's surface.
Ganymede is the largest moon in our solar system and the only moon with its own magnetic field. The magnetic field causes aurorae, which are ribbons of glowing, hot electrified gas, in regions circling the north and south poles of the moon. Because Ganymede is close to Jupiter, it is also embedded in Jupiter's magnetic field. When Jupiter's magnetic field changes, the aurorae on Ganymede also change, "rocking" back and forth so by watching the rocking motion of the two aurorae, scientists were able to determine that a large amount of saltwater exists beneath Ganymede's crust affecting its magnetic field.
Researchers have detected about 20 rotating dust and gas discs in two clusters hosting exceptionally large and hot stars. The science mystery is how the rotating discs are able to withstand evaporation under such extreme conditions - if there is a Hell, this must certainly be it.
The center of the Milky Way is a nursery for young stars: In its heart, more young stars are born in dark clouds than in any other place in the Galaxy. These stars form in rich groups such as the 'Quintuplet' and 'Arches' clusters. Both star clusters are only a few million years old and contain stars as massive as 100 times the mass of the Sun.
Most of the times we have looked at Uranus, it has seemed to be a relatively calm place. Well, yes its atmosphere is the coldest place in the solar system.
But, when we picture the seventh planet in our solar system invariably the image of a calming blue hazy disc that the spacecraft Voyager 2 took in 1986 comes to mind.
However, all we have previously known about the atmosphere of Uranus has been ’thrown to the wind’ with observations made last year.
Four billion years ago, a young Mars had enough water to bury its whole surface under 400 feet of ocean, but it is more likely that, as on Earth, it pooled. In the case of Mars, it probably formed an ocean occupying almost half of Mars’s northern hemisphere, reaching a mile deep in some places.
This new finding is based on detailed observations of two slightly different forms of water in Mars’s atmosphere. One is the familiar form of water, made with two hydrogen atoms and one oxygen, H2O. The other is HDO, or semi-heavy water, a naturally occurring variation in which one hydrogen atom is replaced by a heavier form, called deuterium.
Undefined matter under the envelope of "dark matter" makes up over 80% of the universe - but it has never been directly detected.
But the search is on to narrow it down and a new paper has computationally set limits to the properties of one of the particles which might be identified as dark matter: axions. Due to the high temperature inside stars, photons can turn into axions that escape to the exterior, carrying energy with them.
The simulation indicates that the emission of axions can significantly diminish the time for the central combustion of helium, the so called HB (Horizontal Branch) phase: the energy taken by axions is compensated with the energy provided by nuclear combustion, which leads to a much faster consumption of helium.