News tagged with sun

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Tilted suns

(Phys.org) —The Earth's axis of rotation is tilted 23.4 degrees to its orbital motion around the Sun (more precisely, its spin axis has a tilt of 23.4 degrees with respect to the axis of its orbit). This ...

Nov 04, 2013
4.8 / 5 (13) 0 | with audio podcast

Sun emits fourth X-class flare in a week

The sun emitted a significant solar flare—its fourth X-class flare since Oct. 23, 2013—peaking at 5:54 p.m. on Oct. 29, 2013. Solar flares are powerful bursts of radiation. Harmful radiation from a flare ...

Oct 30, 2013
4 / 5 (3) 0

Sun continues to emit solar flares

After emitting its first significant solar flares since June 2013 earlier in the week, the sun continued to produce mid-level and significant solar flares on Oct. 27 and Oct. 28, 2013.

Oct 28, 2013
4 / 5 (5) 0 | with audio podcast

Why is comet ISON green?

Undoubtedly, you've been seeing the recent images of Comet ISON now that it is approaching its close encounter with the Sun on November 28. ISON is currently visible to space telescopes like the Hubble and ...

Oct 25, 2013
5 / 5 (2) 2

Will comet ISON survive its brush with the Sun?

(Phys.org) —The much-anticipated close approach of comet ISON to the Sun this November may be spectacular as viewed from Earth, but it's unlikely to spell the end of the comet, according to a numerical-simulation study ...

Oct 11, 2013
4.8 / 5 (5) 1 | with audio podcast