Ashokan Rajarajan

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Surprise Discovery Shows We Have Been Totally Wrong About The Size of Andromeda Galaxy

Whaaaat?<p>A new technique for measuring the mass of galaxies has been applied to our closest galactic neighbour - and it has found that the Andromeda …

There Might Be a Universe Inside Every Black Hole

Most experts agree that the universe started as an infinitely hot and dense point called a singularity. Wait a minute. Isn't that what people call …

Black Holes

How Does Earth Move Through Space? Now We Know, On Every Scale

Ask a scientist for our cosmic address, and you’ll get quite a mouthful. Here we are, on planet Earth, which spins on its axis and revolves around the Sun, which orbits in an ellipse around the center of the Milky Way, which is being pulled towards Andromeda within our local group, which is being …

Astronomers just achieved something Einstein said was impossible

Albert Einstein himself believed it couldn't be done.<p>A few decades after he published his theory of general relativity, a colleague asked the famous physicist whether the concept could be used to calculate the weight of a star. Theoretically, yes, was his reply. If one star passed in front of …

Physics

'Cool' New Knee Procedure Eases Arthritis Pain Without Surgery

A new, non-invasive knee procedure could bring some relief for patients suffering from debilitating chronic pain, for whom surgery is not an option.<p>The treatment, recently approved by the Food and Drug Administration, is called “cooled radio frequency ablation” and is a less drastic option for …

Pain

Congress Wants Not One, But Two Europa Missions

This icy world could be our best bet for finding life.<p>Jupiter's moon Europa could be the best place in the Solar System to look for life beyond Earth. In fact, NASA scientists revealed this week that the moon's subsurface ocean could be similar to the oceans here on Earth. This boosts the chances …

Astronomy

How Quickly Did the Crew of Apollo 13 Know They Had Lost the Moon?

Forty-six hours and 43 minutes into the flight of Apollo 13, Capcom Joe Kerwin had a mission update for commander Jim Lovell: “The spacecraft is in real good shape as far as we are concerned. We're bored to tears down here." Nine hours later, things got a lot less boring. A routine stir of the …

Energy

When black holes collide – If our eyes could see gravitational waves

Picture the scene: two gigantic black holes, each one a good fraction of the size of our Solar System spiralling around each other. Closer and closer …

Big Bang, Deflated? Universe May Have Had No Beginning

If a new theory turns out to be true, the universe may not have started with a bang.<p>In the new formulation, the universe was never a singularity, or …

You can buy the only sunglasses made with NASA-certified technology for less than $80

From the surface of the moon to a crescent Earth, their eyes have experienced firsthand a grandeur that most of us will never witness.<p>But those breathtaking views come at a high price for many because in space, astronauts are exposed to higher levels of high-energy light, or radiation, compared to …

2002 July 6 - Io: Moon Over Jupiter

<b>Io: Moon Over Jupiter</b> <b><br>Credit:</b> Cassini Imaging Team, Cassini Project, NASA<p><b>Explanation:</b> How big is the Jovian moon Io? The most volcanic body in the …

Astronomy

Papanasam review: cable TV could help Kamal Hassan get away with murder

In last week’s Sardarji review, I mentioned how Indian directors and stars frequently move between the country’s regional industries. The new release Papanasam arrives as a fine demonstration of how ideas can likewise cross those same borders.<p>Jeethu Joseph’s thriller Drishyam was one of Malayalam …

5 Facts about Gravity Waves from the Big Bang - The Countdown #44