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Editors of EarthSky

Hubble celebrates 21st anniversary with image of rose galaxies

A newly released Hubble image shows spiral galaxy twisted into bejeweled rose by companion galaxy.

Two disturbed spiral galaxies

An astronomy enthusiast's search through the archives of the European Southern Observatory revealed an astonishing image of two spiral galaxies in a tug of war.

Study suggests large galaxies stopped growing 7 billion years ago

Brightest cluster galaxies (BCGs) appear not to have tripled in size, as conventional models predicted for large galaxies.

Jupiter-like worlds have shocking environments

Clues that other Jupiter-like worlds have a protective magnetosphere like Earth's is a big step in looking for zones that could support life.

Ancestors of land plants revealed

The study is called "Origin of land plants: Do conjugating green algae hold the key?"

Nanofiber spheres injected with cells into wounds

When nanofiber spheres are injected with cells into wounds, the spheres biodegrade, but the cells live on to form new tissue.

Twitter users surveyed after earthquake in Japan

Twitter users can benefit those seeking to broadcast or discover information in times of disaster, but a method for regulating false "retweets" might be needed.

Little Ice Age caused by other factors than quiet sun

Factors other than low sunspot activity must have contributed to the Little Ice Age that began in the 17th century, according to a new study.

Big Bang still possible to deduce in the future

We could still find evidence of the Big Bang and an expanding universe a trillion years from now, even with no galaxies visible in the night sky.

Jupiter climbs upward in eastern dawn during May 2011

You're not likely to see much of the planet Jupiter in early May 2011. However, the giant planet quickly climbs away the glow of dawn throughout the month. When will you first spot Jupiter, the sky's second planet, in the east before sunrise?