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    3. velj

    Astronomy for a better world! Astronomy combines science & technology w/ inspiration & excitement, playing a pivotal role in facilitating education & human capital development. Image: The IAU Office of Astronomy for Development banner.

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    2. velj

    Earth physically rotates in 23hours 56min relative to distant stars – a Sidereal Day, BUT it takes 24hours to rotate relative to the Sun – a Solar Day The difference? Earth orbits the Sun, so the Sun appears to move (down, in the vid), which means Earth needs +4mins to catch up!

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    28. sij

    We rightly acknowledge the fabulous Joe Silk for "Silk damping" and the CMB. In fact, there were three papers needed to get to the full result: Tomita (1967) Silk (1968) Richie (1969) where the other two are almost never cited. Sadly, Richie died at 30 yrs old.

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    27. sij

    “I think and hope that this inspires everyone to believe that seemingly impossible things can be done.” – scientist and collaboration member Bart Ripperda on the int'l collaboration being awarded the 2020 Einstein Medal.

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    21. sij

    Graduate students studying dynamics and galactic structure: spend the summer in NYC at the CCA summer school. Applications due Feb 15:

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    22. sij

    It's the paper day today! TL;DR precise radial velocities of the GD-1 stellar stream possibly localize the perturber near the Sagittarius orbital plane! searches for next?

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    20. sij

    Recent advances in machine learning have enhanced opportunities in many areas of physical science research. This Reviews of Modern Physics article covers applications, successes, methods, and challenges.

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    19. sij

    I’ve been asked what’s the primary difference between programming in astrophysics vs. programming in robotics. Here’s a thread on the differences I’ve observed, even though I programmed in the same language (Python) for both:

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    20. sij

    Any ancient Milk Way merger was almost certainly gas-rich and did lots of interesting stuff. Some truth in this idea I think. 'The dual origin of the Galactic thick disc and halo from the gas-rich Gaia-Enceladus-Sausage merger' by Robert Grand et al.

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    Happy 90th birthday, (astronaut Edwin Eugene Aldrin Jr. commonly knows as Buzz Aldrin)! The man who walked on the moon visited Nepal in 2016, and also walked into our Innovation Hub in Teku! 🙏

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    18. sij
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    16. sij

    After 16 years of amazing infrared discoveries throughout the cosmos, the mission is coming to end. We will host a live program at 1 p.m. ET on Jan. 22 to celebrate the far-reaching legacy of one of our four Great Observatories.

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    15. sij

    There are some great articles in from the last year that are free this month!

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    I'm an Astronomer. Skills people think I have: - Knowing any constellation thye point out. - Tell their horoscope Skills I really do have: - Look at squiggly lines and tell you whether it's all noise or if there is the faintest hint of a signal.

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    13. sij

    That’s a surprise. Young stars found on the outskirts of the Milky Way – coverage of and team's discovery.

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    "People are not so different. People live in very different circumstances but at heart we have the same type of strengths and weaknesses, just happen to be in different contexts." Wise words from economist Esther Duflo, awarded the 2019 Prize in Economic Sciences.

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    12. sij

    Physicists must start taking philosophy of science seriously or run the risk of stagnating, argues Sabine Hossenfelder ().

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    9. sij

    Today we feature more at : the discovery of a new star cluster "Price-Whelan 1" made possible with . Read the story here:

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