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NASA has shared a stunning view of the Earth’s largest desert, the Sahara Desert, in its latest post on Instagram. The image was captured by NASA astronaut Shane Kimbrough from the International Space Station and could very well be confused for the Red Planet, the American space agency said. The caption, which starts off with “Too hot to handle” seems befitting given that it is one of the harshest terrains on Earth. The note attached to the image reads, “You might be surprised to find this is in fact not a picture of our neighbouring Red Planet – it’s the Sahara Desert.”

The note from NASA further says that the Sahara Desert “is one of the harshest environments on our planet: the largest hot desert on Earth.”

Sharing more information on the ecosystem, the space agency says that data from their satellites revealed that “wind and weather in the Sahara pick up on average 182 million tons of dust from the deserts of Africa and carries it 1,600 miles across the Atlantic Ocean each year.” To put this into perspective, NASA says: “This volume is equivalent to 689,290 semi-trucks filled with dust.”

So, what does this dust do? According to NASA, “this dust helps build beaches in the Caribbean and fertilizes soils in the Amazon. It affects air quality in North and South America.” It may also play a hand in the “suppression of hurricanes and the decline of coral reefs” the note added.

The image evoked a range of emotions among viewers, many of whom expressed the same in the comments section.

Thanking the agency, one user said, “Thank you NASA for everything you do for scientific exploration,” while another wrote, “Such an informative post.”

“And knowing this is on earth, just incredible,” said another.

The Sahara Desert is 3,600,000 square miles (9,200,000 square kilometres) of arid land located in the northern part of Africa. In terms of size, it is only “slightly smaller than the continental United States”, says NASA.

In a recent study conducted by NASA, it was estimated that there would be less Saharan dust carried in the winds in future. As per a report released in April 2021, NASA said that “scientists, using a combination of satellite data and computer models, predict that Africa’s annual dust plumes will actually shrink to a 20,000-year minimum over the next century as a result of climate change and ocean warming.” The study was made in the aftermath of the June 2020 dust plume dubbed “Godzilla” that travelled from the Sahara to North America, across the Atlantic Ocean.

On its journey across the Atlantic, Saharan dust sprinkles into the ocean, “feeding the marine life, and similarly plant life once it makes landfall,” the report said. Not just that, the dust also contains minerals such as iron and phosphorus, which serve as a fertilizer for the Amazon rainforest.


Can Nothing Ear 1 — the first product from OnePlus co-founder Carl Pei’s new outfit — be an AirPods killer? We discussed this and more on Orbital, the Gadgets 360 podcast. Orbital is available on Apple Podcasts, Google Podcasts, Spotify, Amazon Music and wherever you get your podcasts.

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SpaceX Successfully Launches 23 Starlink Satellites on Brand-New Falcon 9 Rocket

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SpaceX Successfully Launches 23 Starlink Satellites on Brand-New Falcon 9 Rocket

SpaceX marked its 60th Falcon 9 flight of 2025 by successfully launching a brand-new Falcon 9 booster rocket on the 20th of May. This rocket carries 23 Starlink V2 Mini satellites into low Earth orbit. Among those, 13 feature Direct to Cell capabilities. Originally, it was targeting 11:58 p.m. EDT on May 19 (0358 UTC on May 20) for the launch, but that try was aborted just before liftoff, for reasons that the company did not immediately explain. It was finally launched on Tuesday (May 20) at 11:19 p.m. EDT (0319 GMT on May 21) from the Space Launch Complex 40 at Cape Canaveral Space Force Station in Florida.

About the launch

According to SpaceX’s mission overview, this was the first-ever launch for this particular Falcon 9’s (booster B1095) first stage. While most recent SpaceX missions have reused Falcon 9 boosters , a signature part of the company’s cost-saving and sustainability strategy ,Tuesday’s flight featured a rare first-stage debut.

The rocket successfully completed its initial mission, separating from the upper stage around two and a half minutes after liftoff. About eight minutes later, the booster made a precise landing on the SpaceX drone ship “Just Read the Instructions,” stationed in the Atlantic Ocean. This smooth recovery sets the stage for future reusability of the rocket.

Technical Advancement

Of the 23 satellites onboard, 13 were outfitted with direct-to-cell technology — a feature designed to enable satellite connectivity directly to mobile phones, especially in areas lacking terrestrial infrastructure. After reaching space, the rocket’s second stage performed a short engine burn to circularize the orbit before deploying the satellites about 65 minutes after launch.

Starlink is the largest satellite megaconstellation ever constructed, consisting of about 7,500 operational satellites at the moment. And that number is growing all the time, as Tuesday’s action shows.

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Polaris Wasn’t Always the North Star: How Earth’s Wobble Shifts the Celestial Pole

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Polaris Wasn’t Always the North Star: How Earth’s Wobble Shifts the Celestial Pole

Polaris has been the constant guide for explorers and navigators in the northern hemisphere for thousands of years, hence its other name, the famous North Star. It is significant where it is located near the north rotational axis of Earth, and the whole sky appears to spin about it. But that’s not always been the case, and it won’t always be the case. The planet’s sluggish axial wobble, called precession, makes the pole trace a circle about every 26,000 years, bringing different stars into view over the ages.

How Earth’s 26,000-Year Axial Precession Shifts the North Star Over Time

As per NASA, gravitational forces from the sun and moon affect the rotation of Earth; these produce a bulge at the equator and axial precession. Every 26,000 years or so, this wobble makes a complete circle, and it makes the celestial pole move on a cycle, pointing to stars in sequence over time. Thuban, in the star constellation Draco, was the closest visible in the sky to the celestial pole some 4,700 years ago. The stars, such as Kochab and Pherkad, were the nearest to the pole about 3,000 years ago. Polaris now has the title, but not for very long.

The axis of the Earth will eventually change again, bringing new stars into prominence. In about 2,200 years, Errai in the constellation Cepheus will become the North Star. Alderamin, likewise in Cepheus, will have its turn some 5,000 years from now. Deneb, who will approach the pole once more about 9,800 CE, and Vega, a former pole star, returning in roughly 12,000 years, complete this cycle.
Many of these stars fit identifiable constellations, including Cepheus, Draco, and Ursa Minor. Modern stargazing apps incorporating augmented reality for nighttime sky navigation allow amateur astronomers to trace their positions.

As Polaris continues to shine overhead today, its reign is only temporary. Earth’s steady 26,000-year precessional cycle guarantees that other stars will eventually take its place, proving that even in the cosmos, change is constant.

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Scientists Warn of Inadequate Solar Storm Forecasting: What You Need to Know

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Scientists Warn of Inadequate Solar Storm Forecasting: What You Need to Know

Imagine being told a storm is approaching, but you won’t know how dangerous it truly is until minutes before impact. That’s the reality scientists face with solar storms. Although scientists have improved our ability to monitor coronal mass ejections (CMEs) from the Sun and project their arrival at Earth, the most important consideration — the orientation of the storm’s magnetic field — remains unknown until the very last minute. This direction, referred to as the Bz component, decides whether the CME will pass by with little influence or cause disturbances to satellites, electricity grids, and GPS systems.

Lack of Early Bz Data Leaves Earth Vulnerable to Solar Storms, Scientists Urge Wider Sun Coverage

As per a report on Space.com, solar physicist Valentín Martínez Pillet emphasised that knowing the Bz value earlier could dramatically improve our ability to prepare. Currently, spacecraft like NASA’s ACE and DSCOVR detect Bz only when the CME reaches Lagrange Point 1 (L1), giving us just 15 to 60 minutes’ warning. Martínez Pillet predicts it could take 50 years to achieve the forecasting precision we have for Earth’s weather unless we expand our view of the Sun with new satellites placed at Lagrange points L4, L5, and L3.

Despite having the scientific models needed, Martínez Pillet argues we lack vital real-time data from different solar perspectives. Most observations currently come from a single vantage point — L1, which limits our predictive ability. Missions like ESA’s upcoming Vigil, scheduled for launch in 2031 to L5, aim to fill this gap by detecting the CME’s shape and magnetic orientation from the side, potentially giving up to a week’s notice.

But decades may be too long to wait. History reminds us of the danger: the 1859 Carrington Event caused telegraph failures, and a near miss in 2012 could have caused trillions in damage if it had struck Earth. In a 2013 paper, Dan Baker of LASP warned that a direct hit would have left the modern world technologically crippled.

Today, tools like the Global Oscillation Network Group (GONG) and DSCOVR offer continuous solar monitoring, but their limitations emphasise the need to provide broader coverage. “The Sun isn’t changing,” Martínez Pillet said. “It’s our dependence on technology that’s made us more vulnerable.” Until we build the infrastructure to see solar storms before they hit, we may remain dangerously exposed.

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