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🚨: This star exploded when dinosaurs still roamed Earth, and its light didn’t reach us until 2015. SN 2015F, a Type Ia supernova, is located roughly 81 million light-years away.

248,162 次观看 • 3 个月前 •via X (Twitter)

41 条评论

The Goal Line Grind 的头像
The Goal Line Grind3 个月前

Trying to wrap your mind around how far some of these things are is wild.

Space Explained 的头像
Space Explained3 个月前

so true, we can’t comprehend it

ᴀʟᴇᴄ 🍃 的头像
ᴀʟᴇᴄ 🍃3 个月前

actually so insane how we be seeing things from the past like that

Space Explained 的头像
Space Explained3 个月前

it’s crazy how it works

𝙏𝙧𝙖𝙫𝙞𝙨 的头像
𝙏𝙧𝙖𝙫𝙞𝙨3 个月前

the concept of lightyears is interesting fr

Space Explained 的头像
Space Explained3 个月前

it is! 🫡

𝐠𝐮𝐜𝐜𝐢𝐟𝐞𝐫 的头像
𝐠𝐮𝐜𝐜𝐢𝐟𝐞𝐫3 个月前

man that’s just so captivating

Space Explained 的头像
Space Explained3 个月前

facts

Denali Trades 的头像
Denali Trades3 个月前

I love this kind of stuff thanks for sharing 💙

HandymanBrandon 的头像
HandymanBrandon3 个月前

Why does the timestamp jump backwards from the end of June to the beginning of February of the same year?

a 的头像
a3 个月前

how did it explode

Space Explained 的头像
Space Explained3 个月前

@areyoumarcus it accumulated too much mass from a companion star

fawk ✶ 的头像
fawk ✶3 个月前

damnn

Det 💮 的头像
Det 💮3 个月前

That's crazy

Space Explained 的头像
Space Explained3 个月前

facts

Space Explained 的头像
Space Explained3 个月前

🫡

WavyTalkHoops 的头像
WavyTalkHoops3 个月前

This is insane 🔥

Space Explained 的头像
Space Explained3 个月前

your right 🔥

SteveffinR 的头像
SteveffinR3 个月前

Space is fascinating

NuKEYLendingUtah 的头像
NuKEYLendingUtah3 个月前

The sky is a time machine 😌

End Psychological Warfare 的头像
End Psychological Warfare3 个月前

Dinosaurs are fake.

anish 的头像
anish3 个月前

Wow

Space Explained 的头像
Space Explained3 个月前

😳

Buggin Fasho 的头像
Buggin Fasho3 个月前

crazy

Scumbags From Mars 的头像
Scumbags From Mars3 个月前

thats crazyyy

Space Explained 的头像
Space Explained3 个月前

fr

barren 的头像
barren3 个月前

crazy

Pure Sitcoms 的头像
Pure Sitcoms3 个月前

no way

Space Explained 的头像
Space Explained3 个月前

@foundallsaint 🙏

Rocket Man 🚀 的头像
Rocket Man 🚀3 个月前

80 million years just for us to finally see it. Space is terrifyingly huge.

O 的头像
O3 个月前

我都理解不了

Krzysztof Sałek KO Stalowa Wola 的头像
Krzysztof Sałek KO Stalowa Wola3 个月前

That’s incredible

XT095 的头像
XT0953 个月前

Wow

Idiot_Prophet33 的头像
Idiot_Prophet333 个月前

Lies

13=4 THE WATCHER 的头像
13=4 THE WATCHER3 个月前

Prove it.

Ian Herbert 的头像
Ian Herbert3 个月前

Did dinosaurs roam the earth?

chim 的头像
chim3 个月前

incredible

Ginger Opera 的头像
Ginger Opera3 个月前

What would be the blast radius of such an explosion? How big would the fireball be? Light years across?

Alladin 的头像
Alladin3 个月前

Imagine believing in “ dinosaurs”

LuisMi Blanko 的头像
LuisMi Blanko3 个月前

Alucinante

The Wears On 的头像
The Wears On3 个月前

Crazy

相关视频

A one-in-a-million chance—and it happened. A team from the Technical University of Munich spent six years compiling a list of promising gravitational lenses and waiting for a supernova to explode behind one of them. In August 2025, it happened. A superluminous supernova 10 billion light-years away was located precisely behind two foreground galaxies—and its light, bent by gravity, produced five images of the same explosion. Typically, lenses produce two or four—five was a surprise even to the authors. The supernova was named SN Winny. The odds of such a coincidence are less than one in a million. But the value of the discovery is enormous. Light from the supernova travels to us along different paths around the lensing galaxies, and each path has its own length. Because of this, the five copies appear with different time delays. By measuring these delays and knowing the mass distribution in the lensing galaxies, one can directly calculate the Hubble-Lemaître constant, or the rate of expansion of the Universe. How is this better than existing methods? The classic "cosmic distance scale" is a multi-step process, with errors accumulating from step to step. Microwave background radiation measurements are precise, but depend on models of the evolution of the Universe. The lensed supernova method is a single-step process, with completely different sources of error. SN Winny is particularly convenient: it is lensed by just two individual galaxies with a simple mass distribution, rather than a complex cluster. SN Winny is currently being observed by telescopes around the world. The results could bring us closer to resolving the Hubble controversy—the discrepancy between the two main methods for measuring the expansion rate.

Black Hole

180,949 次观看 • 7 个月前

You're looking at the longest X-ray timelapse of a supernova ever captured. In 1604, a brilliant new star suddenly blazed in the night sky, surpassing Jupiter in brightness for weeks. This spectacle marked the explosive death of a white dwarf in a Type Ia supernova—one of the universe's most energetic cataclysms. Over 400 years later, astronomers continue to observe its expanding aftermath. Drawing on 25 years of X-ray observations from NASA’s Chandra X-ray Observatory (spanning 2000 to 2025), scientists have created the longest-ever X-ray timelapse of Kepler’s Supernova Remnant. This glowing shell of debris, located about 17,000 light-years away in our Milky Way, appears as it plows through interstellar space. The remnant expands unevenly: the lower edge races outward at up to 13.8 million miles per hour (22.2 million km/h)—roughly 2% the speed of light—while the upper regions move more slowly, around 4 million miles per hour (6.4 million km/h), due to encounters with denser surrounding gas. These asymmetries allow researchers to map the pre-explosion environment and refine models of the blast itself. Beyond destruction, such supernovae enrich the cosmos by forging and dispersing heavy elements essential for forming new stars, planets, and ultimately, life. Through enduring missions like Chandra, we gain a front-row view to these ancient events, revealing how the echoes of stellar deaths persistently sculpt the evolving universe. ["Supernova Remnant Video From NASA’s Chandra Is Decades in Making." NASA, 2026]

Massimo

32,866 次观看 • 8 个月前