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

° '
° '

After our Sun dies, will the planets still orbit it?

ROBERT BURKE, LAKEMOOR, ILLINOIS
In about 5 billion years, the Sun will exhaust its central supply of hydrogen, and it will swell into a red giant star, fusing hydrogen in a shell around a dead core of helium "ash." Eventually this core will ignite, and the Sun will shrink somewhat in size as it fuses helium into carbon and oxygen. The Sun will quickly exhaust its helium and swell into a larger red giant as it enters its "asymptotic giant branch" phase. Matter more easily escapes the red giant Sun. Soon after becoming an asymp...

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.

ADVERTISEMENT
ADVERTISEMENT
BoxProductcovernov

Click here to receive a FREE e-Guide exclusively from Astronomy magazine.

Find us on Facebook

Loading...