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NASA Spacecraft Spots Dramatic View Of New Impact Crater On Mars

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There’s a fresh crater on Mars, a reminder of our still-dynamic solar system.

NASA‘s Mars Reconnaissance Orbiter, a spacecraft orbiting Mars since 2006, uses an extremely powerful camera to observe the Martian surface. The team running the aptly named High Resolution Imaging Experiment, or HIRISE camera, recently released a detailed image of this impact crater.

“A Small, Very Recent Impact Crater,” they succinctly posted online. “That’s it. That’s the whole caption.”

It’s not that small. Maybe small compared to the Martian behemoths. The image above is 1 kilometer (0.6 miles) across, while the zoomed-out view below shows a Martian scene 5 km (3.1 miles) wide.

It’s unclear when such a recent object, likely an asteroid, crashed into Mars, leaving a sizable dent in the equatorial region of the Red Planet. But you can see markings from ejecta strewn around the impact basin.

The “very recent” impact crater spotted in the equatorial region of Mars.
Credit: NASA / JPL-Caltech / UArizona

Mars is absolutely covered in craters. NASA estimates there are over a quarter-million impact craters about the size of Arizona’s famous Barringer Crater, which is some 4,000 feet across. And there are over 43,000 Martian craters larger than three miles wide.

The Red Planet is much closer to our solar system’s asteroid belt, a region teeming with millions of asteroids. When they do collide with Mars, the Martian atmosphere is just 1 percent the volume of Earth’s, meaning these space rocks are less likely to heat up and disintegrate. What’s more, Mars isn’t nearly geologically dead — marsquakes frequently occur there — but it’s not nearly as active as Earth, a water-blanketed planet teeming with erupting volcanoes. On Mars today, there’s no geologic activity or volcanism to wash away, or cover up, new craters.

(Meanwhile, Earth has just around 120 known impact craters. That’s because over hundreds of millions of years, different parts of Earth’s surface have both been covered in lava or recycled as the giant plates that compose Earth’s crust, tectonic plates, continually move rock below and back up to the surface.)

As for us Earthlings, significant strikes from asteroids are rare:

– Every single day, about 100 tons of dust and sand-sized particles fall through Earth’s atmosphere and promptly burn up.

– Every year, on average, an “automobile-sized asteroid” plummets through our sky and explodes, explains NASA.

– Impacts by objects around 460 feet in diameter occur every 10,000 to 20,000 years.

– And a “dinosaur-killing” impact from a rock perhaps a half-mile across or larger happens on 100-million-year timescales.

So there’s no reason to live in fear — but it’s reasonable to have a healthy level of respect for the big space rocks out there. After all, with the asteroid deflection technology being created and tested today, we might be able to nudge a menacing asteroid off its course, should one ever barrel toward our humble blue planet.



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NASA To Make Major Announcement On Its Ambitious Mars Sample Return Mission Today; Watch Live

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NASA is hosting a press conference on April 15 for a big announcement regarding its Mars Sample Return Mission. The agency said that the speakers will discuss the next steps of the mission aimed at retrieving samples collected by the Perseverance rover on Mars at 10:30 pm IST. The speakers include NASA Administrator, Bill Nelson and Associate Administrator of the Science Mission Directorate, Nicky Fox.

You can watch the teleconference live at NASA TV and its official website here. The discussion will be based on the report by the Independent Review Board which was set up in 2023 to evaluate the technical, cost, and schedule plans prior to confirmation of the mission’s design.

ALSO SEE: NASA Shares Views Of Perseverance Rover’s Sample Collection In Latest Milestone On Mars

The Mars sample return program, apart from its complexities, has a major problem to deal with – a supposedly ‘unrealistic’ budget. Ever since its landing in the Jezero crater on Mars, the Perseverance rover has collected two dozen soil and rock samples which are waiting to be shipped to Earth early next decade.

The samples are being collected because scientists believe they might have signs of ancient life on the red planet since it used to have oceans billions of years ago.

According to NASA’s plan, it will send a lander with a rocket to Mars which will transfer the samples to an orbiter built by ESA. This orbiter will then send the samples back to Earth. All this is expected to cost between $8 to $11 billion, the review board said in its report released last September. In the upcoming announcement, NASA might clear the air regarding the feasibility of the mission and if it is worth pursuing.

ALSO SEE: What Does A Solar Eclipse On Mars Look Like? NASA Answers With Breathtaking Views





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Mess Created By NASA Will Be Inspected By ESA’s Hera Mission; Here’s All About It

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The European Space Agency (ESA) is gearing up for an ambitious mission called Hera, set to launch in October 2024. The mission’s target will be Dimorphos, an asteroid orbiting the larger space rock Didymos.

Dimorphos gained international attention when it became the subject of NASA’s Double Asteroid Redirection Test (DART) mission. On September 26, 2022, NASA’s spacecraft intentionally collided with Dimorphos to test whether altering its orbit was a viable method of planetary defense.

Now, ESA’s Hera mission is poised to rendezvous with Dimorphos in 2026, building on the groundwork laid by DART. The objectives are ambitious: Hera will delve into the Didymos binary asteroid system, conducting the very first assessment of its internal properties. Additionally, it will meticulously analyse the aftermath of DART’s kinetic impactor test, including studying the crater left behind by the collision.

Hera represents a significant milestone in asteroid deflection technology, paving the way for future planetary defense strategies. By conducting a detailed post-impact survey of Dimorphos, Hera aims to transform the DART mission into a well-understood and repeatable defense technique.

ALSO SEE: NASA’s DART Mission’s Second Observer Captures Unsettling Images Of An Asteroid Crash

What makes Hera even more groundbreaking is its role as humankind’s first probe to rendezvous with a binary asteroid system. It will also be armed with innovative technologies, including autonomous navigation and low-gravity proximity operations.

Using ground-based telescopes, scientists know that DART changed Dimorphos’s velocity but they need a close-up inspection to determine the change in its mass. The HERA mission also includes two cubesats – Milani and Juventas – that will collectively investigate Dimorphos’s composition and change in its properties.

NASA ruled the DART mission a success after the spacecraft was able to change Dimorphos’s orbit around Didymos by 33 minutes. Scientists believe that this technology could one day help us deflect a planet-killing asteroid if one heads toward Earth someday.

ALSO SEE: Collision Of NASA’s DART With Asteroid Dimorphos Changed Its Shape; Finding Excites Scientists





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Unexpected Discovery In A Nebula 3,800 Light-Years Away Leaves Astronomers Surprised

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Astronomers peering into the depths of space have stumbled upon a celestial spectacle unlike any other – a stellar pair locked in a cosmic dance, surrounded by a mesmerizing cloud of gas and dust. But what sets this duo, dubbed HD 148937, apart from the stellar crowd is a remarkable tale of cosmic collision and rebirth.

Located a staggering 3800 light-years away in the Norma constellation, HD 148937 is home to two stars of immense magnitude, each boasting a mass far surpassing that of our Sun.

Yet, upon closer inspection, astronomers were met with a perplexing revelation – these stars, once thought to be twins, harbor striking differences. One star appears 1.5 million years younger and inexplicably magnetic, while its counterpart bears the marks of age and lacks magnetic allure.

Utilizing data collected over nine years from cutting-edge instruments like PIONIER, GRAVITY, and FEROS, astronomers uncovered a violent history. The evidence pointed to a tumultuous past, wherein three stars once roamed the system, until two stars collided, birthing the stunning nebula that now envelops HD 148937.

ALSO SEE: NASA’s Hubble Telescope Captures ‘Fierce And Fabulous’ Tarantula Nebula Brimming With Baby Stars

“The two inner stars merged in a violent manner, creating a magnetic star and throwing out some material, which created the nebula,” professor Hugues Sana, lead investigator explained in an official statement.

This cosmic ballet not only reshaped the system’s destiny but also shed light on a longstanding mystery in astronomy – the origin of magnetic fields in massive stars. While magnetic fields are common in stars like our Sun, their presence in more massive counterparts has long puzzled astronomers. The discovery of HD 148937 provides compelling evidence that such magnetic fields can arise from stellar mergers, a phenomenon observed only in theory until now.

“Magnetism in massive stars isn’t expected to last very long compared to the lifetime of the star, so it seems we have observed this rare event very soon after it happened,” said Abigail Frost, lead author of the new paper published in the journal Science.

ALSO SEE: ESO’s Very Large Telescope Captures ‘Gloomy Portrait’ Of Cone Nebula, A Staggering Star Factory





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