|
Important Notice
We hope you enjoy Astronomy magazine's weekly newsletter. To receive an expanded version of this newsletter and all the great online benefits of Astronomy.com, subscribe today! |
|
|
|
 |
NASA/CXC/M. Weiss
|
|
|
|
Dark matter guides growth of supermassive black holes
Every massive galaxy has a black hole at its center, and the heftier the galaxy, the bigger its black hole. But why are the two related? After all, the black hole is millions of times smaller and less massive than its home galaxy. A new study of football-shaped collections of stars called elliptical galaxies provides new insights into the connection between a galaxy and its black hole. It finds that the invisible hand of dark matter somehow influences black hole growth. This new research was designed to address a controversy in the field. Previous observations had found a relationship between the mass of the central black hole and the total mass of stars in elliptical galaxies. However, more recent studies have suggested a tight correlation between the masses of the black hole and the galaxy's dark matter halo. It wasn't clear which relationship dominated. Read more. |
|
|
|
|
Derzay Family
|
Astronomy selects 2015 Youth Essay Contest winner
Thirteen-year-old Julia Derzay of Pewaukee, Wisconsin, wins a trip to the Northeast Astronomy Forum & Telescope Show with her entry for Astronomy’s 2015 Youth Essay Contest. Read more. |
|
|
|
|
|
|
Astronomy: NASA/ESA/The Hubble Heritage Team (STScI/AURA)
|
|
|
|
The special collector’s editor April issue of Astronomymagazine celebrates 25 years of great imagery and science from the Hubble Space Telescope with a package of stories highlighting its greatest discoveries, the various shuttle missions that saved it, its impact on pop culture, and much more.
We’ve also updated the latest Web extras that complement April’s stories. Subscribers can:
|
|
Issue Preview
|
|
|
|
Editor David J. Eicher shares highlights from the April issue. Watch now. |
|
|
|
|
|
|
|
|
|
|
Observing podcast: Open cluster NGC 2439, open cluster NGC 2506, and planetary nebula NGC 2610, by Michael E. Bakich, senior editor Dave’s Universe: Stephen Hawking gets a Celestron! by David J. Eicher, editor Blogs from the Local Group: Legendary planetary imager Don Parker passes away, by Michael E. Bakich, senior editor Planets Gallery: Venus, Mars, and the Moon -- Eric Marcy captured this image February 20, 2015, from Long Valley, New Jersey. Video: The Real Reality Show: Could you Really Travel Through a Black Hole? with David J. Eicher, editor The Sky this Week: A daily digest of upcoming celestial events, by Richard Talcott, senior editor The Sky this Month: Darkness at midday
|
|
|
|
|
|
|
|
|
For questions about new or existing subscriptions, magazine delivery, or to make an address change or purchase products, contact our Customer Service Department at 800-533-6644.
|
|
|
|
|
|
|
|
|
|
|
|
|
댓글 없음:
댓글 쓰기