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What If a Black Hole Flew By Earth at the Speed of Light?

What If | April 26, 2026



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A small but incredibly fast unwanted guest is about to swing past Earth at the speed of light. Yeah, this is the tiniest black hole in the Universe. But despite its small size, could it rip our planet apart? In this video, we’re sending black holes through Earth, from the tiniest black hole just 2 cm (3/4 in) in diameter… to the most massive, stupendously large black hole. For you on Earth, things are about to get bad.

Black hole simulations by @pavelsevecek . Check out his amazing simulator application and support him on Patreon: https://www.patreon.com/pavelsevecek

00:00 What If a Black Hole Flew By Earth at the Speed of Light?
01:12 Gaia BH1
04:46 If the black hole passes through Earth
08:00 A stellar-mass black hole
12:25 Intermediate-mass black holes
15:24 Phoenix A*

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#blackhole #space #earth #whatif #nasa #astronomy #astrophysics #science

Written by What If

Comments

This post currently has 48 comments.

  1. @crystaldazz

    April 26, 2026 at 5:12 am

    Um, if the black hole is traveling at the speed of light, ie, the speed of causality, no one on earth would ever see the effects in the stars, Jupiter, etc, because the time it takes to see it would be the exact time the black hole reaches earth. Being this blatantly wrong and skirting over the most important, fundamental law of physics is … sloppy, to say the least.

  2. @SharkRoach1

    April 26, 2026 at 5:12 am

    not 1 minute in i asked myself, even if it flew by at light speed, wouldn't we still feel the powerful pull regardless of its size even over a year of its travel? Because they're so dense and all?

  3. @bailfire2741

    April 26, 2026 at 5:12 am

    It wouldnt weigh as much as a mountain, it would have as much mass as a mountain. Weight is the effect of gravity and in this case, earth's gravity pulling on you. @WhatIf

  4. @TheAGSquadFam

    April 26, 2026 at 5:12 am

    Me: “You do realize that all these “black holes” you’re talking about won’t do anything to us right?!”
    You: “wdym, why, how do you know?”
    Me: “bc will be gone by then!!!” 4:15

  5. @Mocro405

    April 26, 2026 at 5:12 am

    Glory be to Allah. He creates whatever He wills. To Him belongs whatever is in the heavens and whatever is on the earth.

    .

    .

    .

    .

    .

    .

    .

    Surah Al-A‘raf (7:54)

    “Indeed, your Lord is Allah, who created the heavens and the earth in six days, then established Himself above the Throne.”

    Surah Yunus (10:3)

    “Indeed, your Lord is Allah, who created the heavens and the earth in six days and then established Himself above the Throne, arranging the matter.”

    Surah Hud (11:7)

    “And it is He who created the heavens and the earth in six days—and His Throne had been upon water—to test you as to which of you is best in deed.”

    Surah Al-Furqan (25:59)

    “He who created the heavens and the earth and whatever is between them in six days, then established Himself above the Throne—the Most Merciful.”

    Surah As-Sajdah (32:4)

    “Allah is the One who created the heavens and the earth and whatever is between them in six days, then established Himself above the Throne.”

    Surah Qaf (50:38)

    “And We did certainly create the heavens and the earth and whatever is between them in six days, and no fatigue touched Us.”

    Surah Al-Hadid (57:4)

    “It is He who created the heavens and the earth in six days and then established Himself above the Throne. He knows what enters the earth and what comes out of it…”

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