A pair of interacting galaxies, NGC 4038 and 4039, lying 70 million l.y. away in the constellation Corvus. They have two long, faint, curved, tails extending for 360 000 l.y. (over 20′ on the sky), which give them their name. The tails are probably composed of stars pulled out by gravitational tidal interactions during the collision of a spiral and a lenticular galaxy.
http://hubblesite.org/newscenter/archive/releases/2006/46/image/c/
- nuclear pore
- nuclear power
- nuclear power plant
- nuclear-precession magnetometer
- nuclear reaction
- nuclear reactor
- nuclear stability
- Nuclear Test-Ban Treaty (1963)
- zeolite facies
- zeolites
- zephyr
- Zeppelin, Ferdinand Adolf Heinrich August, Count von (1838–1917)
- zepto-
- Zermelo, Ernst (1871–1953)
- Zermelo-Fraenkel axioms
- Zermelo-Fraenkel set theory
- Zermelo-König paradox
- Zernike, Frits
- zero
- zero-address instruction
- zero-age horizontal branch
- zero-age main sequence
- zero-base budgeting
- zero coupon bond
- zero crossing