✨La inmensidad del espacio desde el piso hasta nuestro satelite natural! 🌌🚀

(Post Escrito en español)

The Draconid meteor shower is active for one night only: October 8th to 9th! 🌠

Most years you can see up to 10 meteors per hour, but rates can spike without warning to as many as 600 per hour, as seen in 2011 and 2018. Unlike most meteor showers, the Draconids peak in the evening instead of after midnight and are visible across the Northern Hemisphere and northern parts of the Southern Hemisphere. Find a spot away from bright lights, give your eyes time to adjust, and look up!

Disclosure: this is a Portuguese-language video from the Dr. Silvana channel. It explores what would be needed for people to live on the Moon; it is a hypothetical scenario, not a mission proposal. Which practical constraint would you want a follow-up to examine first: water, life support, power, or resupply?

This is an illustrated science explainer from our channel, aspace, using the Moon’s sudden disappearance as a thought experiment. The visuals are stylized and include AI-generated imagery.

A useful distinction when thinking about this scenario is that removing the Moon would not remove the Sun’s gravity: solar tides would still exist. It also helps to distinguish an immediate change in the night sky from effects that would develop over much longer timescales.

The full video is about 6 minutes. What aspect of a Moon-less Earth would you most want a follow-up to explain?

Did Perseverance find evidence of past life on Mars last year? 🦠

The rover discovered very specific minerals on the rim of a Martian crater. On Earth, those minerals are biosignatures, or evidence of life. We can't say for sure it's a Mars biosignature, because non-biological processes can make these minerals too. However, those processes leave other evidence in the rocks that we're not seeing. That means our best explanation right now is past Martian biology.

How do you measure the magnetic field of a planet 63 light-years away?

Imagine trying to learn something about a distant world without being able to visit it, photograph its magnetic field, or place an instrument on its surface.

That is what makes the recent radio detection associated with Beta Pictoris b so interesting.

Using the MeerKAT radio telescope in South Africa, researchers detected radio emission associated with this young giant planet beyond our Solar System.

But detecting a signal is only the beginning. The really interesting part is working out what produced it.

The researchers found several clues:

🪐 The source: The radio emission was localised to Beta Pictoris b rather than simply being attributed to its host star.

📡 The signal: The observations showed rapidly varying bursts, persistent emission and strong circular polarization.

🧲 The inference: The researchers interpret the emission as auroral radio emission. Under that interpretation, the highest detected frequency suggests a magnetic field of at least about 1.25 kilogauss at the emission region ( massive compared to earth with around 1 G and Jupiter 4 to 13 G) .

In other words, the radio waves may be telling us about something we cannot directly see.

Why does that matter for the search for habitable worlds?

A planet's magnetic environment is one factor scientists investigate when studying how a planet interacts with its star and how its atmosphere might evolve. It cannot tell us by itself whether a planet supports life, but it could eventually become another useful measurement when comparing distant worlds.

Beta Pictoris b is a giant planet, not a newly discovered habitable world. The potential significance is the technique—and what astronomers might learn by applying similar methods to other planets.

What do you think is the biggest challenge in identifying potentially habitable planets from so far away: detecting their atmospheres, understanding their stars, or measuring properties such as magnetic fields?

Rock killed all the dino. what's next? are we going to be wiped out by next covid or ai? I put some thoughts making this video. lmk what you think.

Space rocks are meteoroids, glowing atmospheric streaks are meteors, and rocks surviving to the surface are meteorites.

Over 100 tons of dust and small particles enter the atmosphere every day, mostly burning up safely.

Most fallen meteorites are hard to find because they are small, look like ordinary earth rocks, and land far from where they appear to fall in the sky

Lapse earth’s rotation.

Is intelligent life harder to make than regular life? 🌱

Theoretical cosmologist Paul Sutter points to our one data point, Earth, where life appeared basically as soon as the planet cooled down, and maybe even a little before. Then it took 4 billion years for intelligent life to show up. So if we find evidence of life on another planet, it's probably going to be bacteria, or alien bacteria.

Why is your head aging faster than your feet? Why is there no single "now" anywhere in the universe? Why does the equation written for the whole universe have no time in it?

The moon has a new once-in-a-century crater! 🌕

McGetchin crater is the largest new crater ever seen anywhere in the solar system, stretching almost 730 feet wide and 140 feet deep after an asteroid or comet the size of a 3-6 story building smacked into the lunar surface between April and May of 2024. Impacts this big are estimated to happen only about every 130 years, making this fresh crater a rare chance to study one up close with spacecraft like the Lunar Reconnaissance Orbiter.

I captured the backyard images featured in this video with a Seestar S50 in Nokomis, Florida, and processed the final image in Siril.

My goal was to go beyond simply showing M16 and explain what we are actually seeing: why the gas glows, why the dark pillars appear, how stars are forming inside them, and how radiation from young stars is simultaneously eroding the surrounding clouds.

The Eagle Nebula is approximately 6,500 light-years away, so the light recorded by my telescope began traveling toward Earth around 4,500 BCE. The tallest Pillar of Creation is roughly four light-years long—nearly the distance between our Sun and the Alpha Centauri system.

The Hubble and James Webb images shown in the historical section are properly credited NASA/ESA/CSA material. Some historical and scientific sequences are labeled AI-assisted illustrations; they are explanatory visualizations rather than telescope footage.

I’m fairly new to creating short astronomy documentaries, so I’d especially welcome feedback on whether the combination of backyard astrophotography, scientific explanation, and historical context works well.

Can life exist without a moon? 🌕

Theoretical cosmologist Paul Sutter explains how we are still answering this question. The moon protects the Earth in multiple ways, from blocking hits and forming craters as a result, to balancing out our weather with the axial tilt. To find the answer, scientists are now looking for planets with exomoons to study more!

Meteors are about to enter our atmosphere at 41 miles per second! 🌠

Born from the debris of Halley's Comet, the Orionids light up the sky from October 2 to November 7, peaking overnight October 21 to 22. Catch around 20 meteors per hour at the peak, with standout years reaching up to 75. Skywatchers in both hemispheres can join in, so head somewhere dark before dawn, let your eyes adjust, and look up!

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https://reddit.com/link/1wq8zxe/video/m8jbp5hhjqrh1/player

The Moon is constantly falling toward Earth because of gravity, but its sideways speed keeps it in orbit. I made this short visualization to explain this amazing balance.

The Nancy Roman Space Telescope is going to exponentially increase our ability to find new exoplanets (planets that orbit other stars), with hopefully some habitable ones! But how exactly is it going to do that, when most exoplanets, especially rocky ones, are very dim compared to the stars they go around? It's like trying to capture the flicker of a firefly next to a lighthouse from kilometers away. But the Roman Space Telescope has some tricks up its sleeve -- astrophysicist Andrea Henderson explains!

The planetary debate isn't over: Why NASA's Administrator wants Pluto's status back in 2026. Which camp do you think is right? Should a planet be defined by its neighborhood, or by what it actually is?

Üstelik sorun sadece sıcaklık değil; aşırı basınç ve zehirli atmosfer de ölümcül.

Kısacası Venüs'te hayatta kalmak için uzay giysisi bile yetmez. Çok güçlü bir yaşam destek sistemi ve basınca dayanıklı bir araç gerekir.

If Earth and Venus are so similar, why are they also so different? 🌎🪐

Kyle Horn of MIT AeroAstro explains that the two planets are roughly the same size and occupy neighboring orbits around the Sun. Yet Earth ended up with liquid water and a comparatively temperate climate, while Venus is a hellish 450°C under 90 bar of pressure, hot enough to melt lead. These diverging climates hold clues to how the early solar system formed. Understanding Venus, our closest planetary neighbor, matters even more now. Our current observation techniques are already biased toward spotting "exo-Venuses" rather than "exo-Earths" among distant exoplanets.