1 Extragalactic nebula is invisible to the naked eye.

2 Although an extragalactic planet is "a nice possibility, " says Pravdo, the more exciting find is what this planet could do to the idea of tame, gradual planet formation. Johns-Krull agrees.

3 Current researches of searching, observation and theory on extragalactic H2O megamaser sources and associated molecular emission lines are mainly reviewed in this paper.

4 Just as extragalactic astronomers were giving up on stellar collisions, their galactic colleagues adopted them with a vengeance.

5 But a bunch of strong extragalactic microwave- and radio-sources are out there too(), mucking up our picture!

6 Although the extragalactic space is a dangerous zone, you should also annihilate all the enemies on your journey.

7 "The claim that it's extragalactic is kind of a guess, " says Pravdo.

8 Since the first extragalactic H2O megamaser source toward the Active Galactic Nuclei NGC 4945 was discovered, 19 sources have been found.

9 NGC 2419 may really have an extragalactic origin as, for example, the remains of a small galaxy captured and disrupted by the Milky Way.

10 A few astronomers have raised doubts about this extrapolation from ordinary galaxies to all extragalactic objects.

11 This database allows an investigation on broad band energy distribution and other possible correlations among spectral indices and luminosities for various types of extragalactic objects.

12 Dr Robert Massey of the UK's Royal Astronomical Society said the paper provided the first "hard evidence" of a planet of extragalactic origin.

13 Astronomer Art Hoag first asked this question when he chanced upon this unusual extragalactic object.

14 This Paper has Studied the observational parameters of 20 extragalactic H 2 O megamaser Sources.

15 Still another technique, very long baseline interferometry, has radio telescopes on the ground listen to extragalactic radio waves to detect changes in the positions of the ground stations.

16 This paper touches the progress in VLBI astrophysics concerning some high lights of extragalactic continuum astronomy, interstellar masers and pulsars and stars from VLBI observations.

17 For the first time, astronomers have detected a planetary system in a stellar stream of extragalactic origin.

18 In this paper, we investigate the relation between the redshift distribution and the luminosity function of extragalactic objects.

19 An exoplanet has been discovered orbiting a star of extragalactic origin that contains far less metal than models predict for stars with planets. Christopher Intagliata reports.

20 We shall hardly even touch the captivating problems of modern extragalactic astronomy.