Nasa has announced that it has found evidence of flowing water on Mars

Nasa Mars water announcement: agency announces it has found proof of flowing water, improving chances of supporting alien life

 

Nasa has announced that it has found evidence of flowing water on Mars — a discovery with potentially huge implications for the possibility of life on the planet.

Scientists have long suspected that the planet might have running water. But the new findings confirm that it is on the planet, combined with “hydrated salts” in a brine.

Normally, water on Mars freezes or evaporates, because of the intense environment on the planet. But the addition of salts means that it is much more stable, allowing it to survive on the Red Planet.

Scientists have long speculated that the Recurring Slope Lineae — or dark patches — on Mars were made up of briny water. But the new findings prove that those patches are caused by liquid water, which it has established by finding the hydrated salts.

The new research is based on an analysis of spectral data from the American space agency Nasa's Mars Reconnaissance Orbiter spacecraft. 

Breaking down reflected light into its different wavelengths provides a chemical "fingerprint" of what a substance is made of. The Mars scientists devised a new method that allowed chemical signatures to be extracted from individual image pixels, providing a much higher level of resolution than had been achieved before.

“Recurring Slope Lineae (RSL) are seasonal flows on warm Martian slopes initially proposed, but not confirmed, to be caused by briny water seeps,” the team behind  the discovery wrote in another paper, due to be delivered this week. “Here we report spectral evidence for hydrated salts on RSL slopes from four different RSL locations from the Compact Reconnaissance Imaging Spectrometer for Mars on board Mars Reconnaissance Orbiter.

“These results confirm the hypothesis that RSL are due to present-day activity of briny water. “

Source:http://www.independent.co.uk/news/science/nasa-mars-water-announcement-agency-announces-that-it-has-found-proof-of-flowing-water-on-mars-a6670446.html

Read more →

It is really confusing..3 or 4 ??

Look at the Image you will find it..!!

Read more →

New Horizons: New 'treasure trove' of high resolution images show Pluto's surface in greater detail

New Horizons: New 'treasure trove' of high resolution images show Pluto's surface in greater detail

 

New high-resolution images downloaded from NASA's New Horizons probe over 5 billion kilometres away have stunned scientists, revealing Pluto's pitted and cratered surface in even more detail than before.

The New Horizons probe passed Pluto in July, sending back the first close-up images ever seen of the dwarf planet and taking tens of gigabits of data that will take an entire year to send back to Earth.

The latest images now show a range of highly complex surface features, including mountains, deep networks of valleys, nitrogen ice flows and possible wind-blown dunes.

 

Photo: A large region of jumbled broken terrain on the surface of Pluto. The smallest visible features are 0.8 kilometres in size. (NASA/Johns Hopkins University/Southwest Research Institute)

"This is what we came for — these images, spectra and other data types that are going to help us understand the origin and the evolution of the Pluto system for the first time," said New Horizons principal investigator Alan Stern, of the Southwest Research Institute (SwRI) in Colorado.

"And what's coming is not just the remaining 95 per cent of the data that's still aboard the spacecraft — it's the best datasets, the highest-resolution images and spectra, the most important atmospheric datasets, and more. It's a treasure trove.

"Pluto is showing us a diversity of landforms and complexity of processes that rival anything we've seen in the solar system.

"If an artist had painted this Pluto before our flyby, I probably would have called it over the top — but that's what is actually there."

The revelation of possible dunes on the dwarf planet's surface has also piqued scientists' interest, as they indicate the atmosphere would have had to be thicker for wind to create the formations.

Timelapse: Pluto comes into focus

View an interactive timelapse of Pluto images captured by New Horizons, and find out what they tell us about this icy dwarf planet.

"Seeing dunes on Pluto — if that is what they are — would be completely wild, because Pluto's atmosphere today is so thin," said William B McKinnon, a GGI deputy lead from Washington University.

"Either Pluto had a thicker atmosphere in the past, or some process we haven't figured out is at work. It's a head-scratcher."

The images have more than doubled the amount of Pluto's surface, seen at resolutions as good as 400 metres per pixel.

They have also revealed Pluto's global atmospheric haze has more layers than scientists realized, creating a twilight effect that softly illuminates nightside terrain near sunset, making it visible to the cameras aboard New Horizons.

"This bonus twilight view is a wonderful gift that Pluto has handed to us," said John Spencer, a GGI deputy lead from SwRI.

"Now we can study geology in terrain that we never expected to see."

The discoveries made from the new imagery will not be limited to the dwarf planet itself — better images of Pluto's moons Charon, Nix and Hydra are also set to be released.

Photo: An image of Pluto's surface showing a smooth ice plain informally dubbed Sputnik Planum. (NASA/Johns Hopkins University/Southwest Research Institute)

 

Read more →

Earth just had its first storm-free hurricane peak in 38 years

Earth just had its first storm-free hurricane peak in 38 years

September 12 marks the peak of the Atlantic Ocean hurricane season, but this year the day passed without any named storms. Odder still, the recently restless Pacific Ocean had a quiet day, too. In fact, across the entire Northern Hemisphere, not a single tropical storm swirled.

This is the first September 12 without a major cyclone since 1977, says Philip Klotzbach, a meteorologist at Colorado State University in Fort Collins. Tropical Storm Vamco’s formation on Sunday ended the 54-hour serenity, the longest September dearth of tropical cyclones since 2009, Klotzbach adds.

While the ongoing El Niño will help calm the Atlantic (SN Online: 7/12/15), those same conditions will probably keep the Pacific churning out titanic typhoons for the next few months

 

Read more →

Satellite captures double solar eclipse in action

Satellite captures double solar eclipse in action

 

A solar eclipse is pretty cool; a double solar eclipse is even better. On September 13, NASA’s Solar Dynamics Observatory (SDO) satellite caught an exceptionally rare sight: the Earth and the moon simultaneously passing across the face of the sun. (Watch an animation showing the momentary alignment of SDO, Earth, the moon and the sun.) Back on Earth, meanwhile, the hardy residents of Antarctica were treated to a partial solar eclipse.
Launched in 2010, SDO studies the sun’s churning atmosphere. Its tilted geosynchronous orbit gives the spacecraft a nearly uninterrupted view, but on rare occasions like this, the Earth or moon can get in the way.

Read more →

how many calories in a banana ..?

The banana is an edible fruit, botanically a berry, produced by several kinds of large herbaceous flowering plants in the genus Musa.

Nutrition Facts

Bananas

Amount Per 100 grams

Calories 89

% Daily Value*
Total Fat 0.3 g	0%
Saturated fat 0.1 g	0%
Polyunsaturated fat 0.1 g
Monounsaturated fat 0 g
Cholesterol 0 mg	0%
Sodium 1 mg	0%
Potassium 358 mg	10%
Total Carbohydrate 23 g	7%
Dietary fiber 2.6 g	10%
Sugar 12 g
Protein 1.1 g	2%

Vitamin A	1%	Vitamin C	14%
Calcium	0%	Iron	1%
Vitamin D	0%	Vitamin B-6	20%
Vitamin B-12	0%	Magnesium	6%

Read more →

We know the Earth is rotating, but why?

Why is everything in the Solar System spinning? And why is it mostly all spinning in the same direction?

 

Why is everything in the Solar System spinning? And why is it mostly all spinning in the same direction?

It can’t be a coincidence. Look down on the Earth from above, and you’d see that it’s turning in a counter-clockwise direction. Same with the Sun, Mars and most of the planets.  

4.54 billion years ago, our Solar System formed within a cloud of hydrogen not unlike the Orion Nebula, or the Eagle Nebula, with its awesome pillars of creation. Then, it took some kick, like from the shock wave from a nearby supernova, and this set a region of the cold gas falling inward through its mutual gravity. As it collapsed, the cloud began to spin.

But why?

It’s the conservation of angular momentum.

Think about the individual atoms in the cloud of hydrogen. Each particle has its own momentum as it drifts through the void. As these atoms glom onto one another with gravity, they need to average out their momentum. It might be possible to average out perfectly to zero, but it’s really really unlikely.

Which means, there will be some left over. Like a figure skater pulling in her arms to spin more rapidly, the collapsing proto-Solar System with its averaged out particle momentum began to spin faster and faster.

This is the conservation of angular momentum at work.

As the Solar System spun more rapidly, it flattened out into a disk with a bulge in the middle. We see this same structure throughout the Universe: the shape of galaxies, around rapidly spinning black holes, and we even see it in pizza restaurants.

The Sun formed from the bulge at the center of this disk, and the planets formed further out. They inherited their rotation from the overall movement of the Solar System itself. Over the course of a few hundred million years, all of the material in the Solar System gathered together into planets, asteroids, moons and comets. Then the powerful radiation and solar winds from the young Sun cleared out everything that was left over.

Without any unbalanced forces acting on them, the inertia of the Sun and the planets have kept them spinning for billions of years.

And they’ll continue to do so until they collide with some object, billions or even trillions of years in the future.

So are you still wondering, why does the Earth spin?

The Earth spins because it formed in the accretion disk of a cloud of hydrogen that collapsed down from mutual gravity and needed to conserve its angular momentum. It continues to spin because of inertia.

The reason it’s all the same direction is because they all formed together in the same Solar Nebula, billions of years ago.

 

Read more →

What's the difference between fission & fusion ?

What's the difference between fission & fusion ?

 

A nuclear reaction is a process in which atoms collide with other atoms and lose some of their original mass. Because of the principle of energy conservation the lost mass must reappear as generated energy, according to Einstein's equation E = mc². The two types of nuclear reactions used to produce energy are fission and fusion.

In a fission reaction, a heavy atomic nucleus is split into smaller nuclei, other particles and radiation. In a typical reaction, an atom of uranium 235 absorbs a neutron and splits into two lighter atoms, barium and krypton, emitting radiation and neutrons. Under special circumstances (the attainment of a "critical mass") the emitted neutrons can split further atoms, which in turn bring about more splitting, producing a very fast chain reaction. Nuclear power plants exploit the process of fission to create energy.  

In a fusion reaction, two or more light atomic nuclei fuse to form a single heavier nucleus. The mass change in the process is the source of nuclear energy. Fusion within the cores of the sun and other stars generates their radiating energy by fusing two hydrogen atoms to produce a helium atom. Current researchers are using magnetic vacuum chambers and laser beams in an attempt to generate the extreme high-temperatures necessary for the fusion process. If successful, the net energy gain would create a viable alternative energy option.

Read more →

Can you find the mistake

Answer:Actually the mistake is not in the numbers.The mistake is in the 1st line.

Read more →

Can You Answer This..??

Options:

A.18

B.24

C.16

D:None

Read more →

Test your knowledge | IQ level

Read more →