They are inside an interstellar cloud which makes them appear blue.

"But I thought the temperature inside the interstellar clouds was always very low indeed?"

They are joined together, having coalesced from the same interstellar cloud.

Interstellar clouds also provide a medium to study the presence and proportions of metals in space.

Less icy, perhaps, but even here, according to her tutor, the interstellar cloud had begun to have its effect.

The solar system condensed from a relatively dense interstellar cloud.

Cyanopolyynes are relatively common in interstellar clouds, where they were first detected around 1970.

Another hypothesis is that they formed from interstellar clouds and were captured by the solar system as it moved through space.

Kerogen materials have been detected in interstellar clouds and dust around stars.

Originating from the same interstellar cloud some two billion years ago, the stars have iron contents about a third that of the Sun.

An interstellar cloud is dust, plasma, or ionized gas in a galaxy.

And here was something new to her: perhaps a new ice age would be triggered by the Earth's passage through an interstellar cloud.

The maps confirm theoreticians' ideas on the birth of stars from interstellar clouds.

Jeans instability is a physical state in which an interstellar cloud of gas will begin to undergo collapse and form stars.

The size of the capsules can be designed to stop at zones with various densities in the interstellar cloud.

Water has been detected in interstellar clouds within our galaxy, the Milky Way.

Galaxies may contain many multiple star systems, star clusters, and various interstellar clouds.

The outflow of the stellar wind from component A produces a bubble within the local interstellar cloud.

Some interstellar clouds are cold and tend to give out EM radiation of large wavelengths.

In modern terms, it means an interstellar cloud of dust, hydrogen, helium and other ionized gases.

Absorption spectroscopy has been particularly important for understanding interstellar clouds and determining that some of them contain molecules.

NH, known as diazenylium, was one of the first ions to be observed in interstellar clouds.

So some researchers attempted to determine the conditions under which methanol is produced in interstellar clouds and the envelopes of young stars.

The fact that they were found indicates that these chemical reactions in interstellar clouds take place faster than suspected.

He published widely in astronomy, and dealt with the solar corona, and interstellar clouds.