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Δευτέρα 22 Δεκεμβρίου 2025

Astronomy Picture Of The Day: Α a bloated red giant named V Hydrae

 

#NASA, #Space, #astronomy, #διάστημα,

Imagine a dying star unleashing hellfire on the cosmos—not with gentle solar winds, but with colossal cannonballs of searing plasma hurled into the void at blistering speeds.Deep in space, 1,200 light-years away, NASA's Hubble Space Telescope caught a bloated red giant named V Hydrae in the act of firing these monstrous blobs. Each one is twice as massive as Mars, scorching hot at nearly twice the Sun's surface temperature (over 17,000°F / 9,400°C), and racing so fast they could cross the Earth-Moon distance in just 30 minutes.This isn't random chaos. Every 8.5 years, like clockwork, another plasma bullet erupts—and this stellar barrage has raged for at least 400 years.What drives this fury? The red giant itself, swollen and shedding mass in its death throes, can't launch them alone. Astronomers point to an invisible companion star, locked in an elliptical orbit. As it plunges close every cycle, it devours material from the giant's atmosphere, spinning it into a frantic accretion disk. When the pressure builds too high, bam—another glowing cannonball blasts out along the disk's axis, sometimes wobbling the direction slightly for dramatic effect.These fiery ejections aren't just spectacle; they may sculpt the wild, knotted shapes of planetary nebulae—the glowing shrouds around dying stars that Hubble has revealed in stunning variety.In a universe we often picture as serene and eternal, discoveries like V Hydrae's plasma onslaught remind us of the raw, explosive violence lurking even in ancient stars. Space is a battlefield of extremes, and with Hubble peering deeper, we're witnessing its most ferocious secrets unfold.What do you think—could this hidden companion eventually spiral in and trigger an even bigger cataclysm?

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