Tonight's Sky
Sun
Sun
Moon
Moon
Mercury
Mercury
Venus
Venus
Mars
Mars
Jupiter
Jupiter
Saturn
Saturn

Tonight's Sky — Change location

OR

Searching...

Tonight's Sky — Select location

Tonight's Sky — Enter coordinates

° '
° '

I was taught that the gravity of a black hole is so great that nothing, not even light, can escape. But I frequently see pictures of dual energy jets emanating from a black hole. How is this possible?

Eric Peters, Anderson, Indiana
January 2010 black hole jets
Black hole jets originate from just outside the event horizon, not from the black hole itself. As the black hole pulls matter toward it, the material loses energy. That energy helps power the jets.
Astronomy: Roen Kelly
The jets arise from the highly energetic region just beyond the edge of the black hole, not from the black hole itself.

Already a subscriber? Register now!

Registration is FREE and takes only a few seconds to complete. If you are already registered on Astronomy.com, please log in below.
ADVERTISEMENT

FREE EMAIL NEWSLETTER

Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. View our Privacy Policy.

ADVERTISEMENT
ADVERTISEMENT
Apollo_RightRail

Click here to download a FREE Apollo PDF curated by Astronomy magazine.

Find us on Facebook