Subashini Ramanan

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Why Is Light Affected By Gravity?

<i>Why is light affected by gravity if photons are massless? originally appeared on Quora:</i> <i>the place to gain and share knowledge, empowering people to learn from others and better understand the world</i>.<p><b>Answer by Matthew Geleta, PhD math (Cambridge); MSc maths (Oxford); BSc Hons math-phys, on Quora:</b><p><b>Why</b> …

Physics

NASA responds to job application from boy, 9

The job was listed this week as <b>the space agency seeks help to protect Earth</b> from aliens.<p>In technical terms, the officer would assist with the …

Space Science

China to launch unhackable quantum messaging service

China is preparing to launch a communications system that would be impossible to hack.<p>The quantum communication system is set to be used by 200 users from government, finance and military personal in the city of Jinan.<p>The Jinan Institute of Quantum Technology said the technology, which was tested …

Are Mars' Trojan asteroids pieces of the red planet?

The Trojan asteroids that follow Mars in its orbit might have come from the planet itself, blown off in an ancient impact rather than being late arrivals, a new study suggests.<p>Several planets in Earth's solar system have Trojan asteroids — bodies that run ahead of or behind the planet. Jupiter, for …

Astronomy

Ask Ethan: Can The Universe Ever Expand Faster Than The Speed Of Light?

It’s the most fundamental law of special relativity, and the realization that led Einstein to some of the greatest physics breakthroughs of all time: the idea that nothing can travel faster than light. That holds true even today, as all massless particles in a vacuum move exactly at the speed of …

Astrophysics

Scientists Generate Quantum Entanglement in Space For the First Time

By entangling particles on a satellite and shooting them down to Earth, China may have just set the tone for a global “quantum space race.”In a new …

Quantum Mechanics

Researchers have successfully implanted 3D-printed ovaries—in mice

Researchers over at Northwestern University in Evanston, Illinois, have successfully restored fertility in mice by using 3D-printed bioprosthetic …

Why Doesn't Antimatter Anti-Gravitate?

Why aren’t there any particles that fall upwards in the gravitational field of Earth? It would be so handy – If I had to move the couch, rather than waiting for the husband to flex his muscles, I’d tie an anti-gravitating weight to it and the couch would just float to the other side of the …

Physics

Dying Red Giant Star Showed A Spiral Pattern Of Gaseous Emissions

The sun is about half-way through its life in its current phase as a main sequence star, and about 5 billion years from now, it will expand into a …

"The Martian" was right: you really can grow potatoes on the red planet

In the 2015 film <i>The Martian</i>, astronaut Mark Watney, played by Matt Damon, is stranded on the red planet after his crew leaves him for dead in the …

CubeSat

Milky Way's Supermassive Black Hole Ate Its Last Big Meal 6 Million Years Ago

Most galaxies in the observable universe contain a supermassive black hole at their center, one that is either active and surrounded by an accretion …

Are Aliens Real? Probably, And They May Be Responsible For Fast Radio Bursts

Ask an astronomer what the top 10 unsolved mysteries in the universe are, and Fast Radio Bursts (FRBs) — intense bursts of radio emissions lasting …

Rapid Temperature Fluctuations Have Been Detected in Black Hole Winds For The First Time

Burps so powerful, they block star birth.<p>Scientists have made the most detailed observations ever of the incredibly fast and strong 'winds' that gust …

What’s Different About Astronaut DNA?

Three researchers describe their findings in NASA’s study of identical twin brothers, one in space and one on Earth.<p>Chris Mason has never met Scott Kelly, but he knows all about his DNA.<p>Mason, a geneticist at Weill Cornell Medicine in New York City, is one of the researchers participating in NASA’s …

Genetics

The Hubble telescope won't crash into Mars, but it may look that way

The Hubble Space Telescope will pass in front of Mars on Friday night — and because of our depth perception — it will look like the decades-old telescope is slamming into the Red Planet.<p>The Hubble's expected path puts it right in front of Mars at 7:58:42 p.m. People think that they can see in 3-D, …

Space.com

What Drives The Universe’s Accelerated Expansion? Researchers Propose Experiment To Determine If Dark Energy Or Modified Gravity Is Responsible

The universe is expanding, and as it does, it is also accelerating. In 2011, three researchers who proved the universe’s expansion was speeding up by …

Can We Launch Nuclear Waste Into the Sun?

When I look at the Sun, I don’t see a warm life-giving orb, nourishing all living creatures here on Earth. No, I see that fiery ball as a cosmic …

Falcon Heavy

NASA Has Found Some of The Biggest And Oldest Black Holes We've Ever Seen

From the early moments of our Universe.<p>NASA has picked up intense gamma ray signals coming from a set of ancient galaxies. The gamma rays are being …

Astronomers have filmed 4 planets orbiting an alien solar system

Located about 129 light years from Earth in the direction of the Pegasus constellation is the relatively young star system of HR 8799.<p>Beginning in 2008, four orbiting exoplanets were discovered in this system which — alongside the exoplanet Formalhaut b— were the very first to be confirmed using …

Universe

How the world will look in 2100

IN 1975, NASA commissioned a team of researchers to illustrate potential space colonies of the future. Their ideas are out there.

Space Science

Two 'L'-shaped observatories with lasers: How to find ripples in space and time

Two large, "L"-shaped instruments separated by 1,865 miles are eavesdropping on the most extreme events in the universe.<p>The two Laser Interferometer …

Astronomers have spotted a black hole so ravenous, it's pushing the limits of physics

Astronomers have discovered a giant black hole that's so hungry, it's been gorging on a star for more than a decade — more than 10 times longer than any stellar meal detected before.<p>Not only is this by far the largest meal a black hole has been seen consuming, but the feast has been going on so …

Astrophysics

Corpse of Weasel Killed by Large Hadron Collider Displayed in Twisted Museum Exhibition

The Large Hadron Collider is the largest and most complex machine in the world, but it only took one adventurous weasel to shut it down in November …