Category: Points of Information

Very brief descriptions, with appropriate links, of current or recent news items.

very big stars

11:20 am

Using the Very Large Telescope in Chile, astronomers have identifed a number of stars with masses thought to range from 150 to as much as 300 times the mass of our Sun. Fun quote from the press release:

Within [star cluster] R136, only four stars weighed more than 150 solar masses at birth, yet they account for nearly half of the wind and radiation power of the entire cluster, comprising approximately 100 000 stars in total.

Stars this gigantic are believed to end their life in an explosion so intense it destroys the star entirely, leaving nothing behind but an expanding debris cloud, from which other stars and planets (and even life) can form.

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Journolist evidence, part 1

10:34 am

More evidence has been uncovered showing that many journalists cared less about reporting the news during the 2008 Presidential campaign than helping Barak Obama get elected. Worse, these reporters were willing to smear their opponents in the worst possible manner, without evidence. Key quote:

In one instance, Spencer Ackerman of the Washington Independent urged his colleagues to deflect attention from Obama’s relationship with [Reverend] Wright by changing the subject. Pick one of Obama’s conservative critics, Ackerman wrote, “Fred Barnes, Karl Rove, who cares — and call them racists.”

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The space war heats up

9:58 am

It appears the space war is heating up again. This analysis of the NASA authorization legislation issued by the House yesterday notes that it has serious differences with the Senate bill. The article notes that the House bill does not fund an additional shuttle mission while insisting that the government continue the construction of some variation of the Orion capsule and Ares rockets. See also this article from the Orlando Sentinel.

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Metals in the inner galaxy

9:11 am

A preprint paper, published today on the astro-ph website but also accepted for publication in the journal Astronomy & Astrophysics, has confirmed what scientists have suspected about the dust and gas between the stars: As you travel closer to the center of the Milky Way galaxy this interstellar medium gets increasingly enriched with heavy elements. The scientists believe this is because the higher rate of supernovae in the inner galaxy sprays space with more of these atoms.

Since the field of extrasolar planets has also found that the more heavy elements a star contains, the more chance it will have planets, the new results above suggest that we will find more planets as we look inward towards the galactic center.

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New plan from the Senate

10:35 pm

This analysis of the Senate budget plan that passed the Senate Commerce committee today hits all the most important points. Key quote (in connection with the Senate’s mandate that NASA start over in building a new heavy lift rocket):

Over the last five years, Constellation has cost at least $9 billion and produced little more than one test flight for a stripped-down version of the program’s Ares I rocket. While the Senate plan instructs NASA to salvage parts of Constellation when possible – and provides $11 billion over the next several years — it will take time and resources to create a new design. Adding to the pressure is the 2016 deadline that Congress gives NASA to have the new vehicle ready.

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