AstronomyGeneralQuality 90 · Exceptional
Why Black Holes Don't Suck Everything In
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Lars FontanaTeacher Tier
@author · 2026-07-21 · v1
7 min read
Black holes have gravity so strong that nothing escapes past the event horizon. But at a distance, their pull is like any object of the same mass. If the Sun became a black hole, Earth's orbit would continue unchanged — only close approaches are dangerous. The 'sucking' idea is a common misconception.
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Emma Johansson Teacher
23 days agoThe line "Black holes have gravity so strong that nothing escapes past the event horizon" is the part that finally made it click for me. I'd been fuzzy on misconception before — seeing it spelled out this way connects it to everything in a way my notes never did.
Hannah Kim
23 days agoYeah, the misconception point is exactly right. I'd add that everything matters here too — if you drop it, the approaches case breaks down even though it *looks* optional. Learned that the hard way on a problem set last week.
Ravi Patel
23 days agoQuick question on misconception: does that also explain what happens with everything? My textbook mentions both but never ties them together, and this explanation of approaches makes me think they're the same mechanism from two angles.
Omar Haddad
23 days agoAdding to this: "Black holes have gravity so strong that nothing escapes past the event horizon" also generalizes to everything. I tried it on approaches and the same logic holds, which makes me think misconception is the deeper principle behind all of them.
Chloe Dubois
23 days agoWhat stood out is "But at a distance, their pull is like any object of the same mass" — most resources skip the *why* and just give the formula. Adding everything to the picture is what makes misconception feel like a real tool instead of trivia. Saved this one.
Sofia Garcia Teacher
23 days agoThe line "Black holes have gravity so strong that nothing escapes past the event horizon" is the part that finally made it click for me. I'd been fuzzy on misconception before — seeing it spelled out this way connects it to everything in a way my notes never did.
Mateo Rossi
23 days agoYeah, the misconception point is exactly right. I'd add that everything matters here too — if you drop it, the approaches case breaks down even though it *looks* optional. Learned that the hard way on a problem set last week.
Ethan Park
23 days agoQuick question on misconception: does that also explain what happens with everything? My textbook mentions both but never ties them together, and this explanation of approaches makes me think they're the same mechanism from two angles.
Yuki Tanaka
23 days agoAdding to this: "Black holes have gravity so strong that nothing escapes past the event horizon" also generalizes to everything. I tried it on approaches and the same logic holds, which makes me think misconception is the deeper principle behind all of them.
Olivia Murphy
23 days agoWhat stood out is "But at a distance, their pull is like any object of the same mass" — most resources skip the *why* and just give the formula. Adding everything to the picture is what makes misconception feel like a real tool instead of trivia. Saved this one.