2020-05-01_Astronomy
Stubborn problems with dark matter, dark energy, and cosmic expansion have some astronomers rethinking what we know about the ea ...
22 ASTRONOMY • MAY 2020 A series of powerful observations has made it clear that our uni- verse has expanded for billions of yea ...
WWW.ASTRONOMY.COM 23 investigate our universe. But so far, these problems have proven to be remarkably stubborn and persistent. ...
24 ASTRONOMY • MAY 2020 speculate about the kinds of particles that might make up this substance. In particular, researchers hav ...
WWW.ASTRONOMY.COM 25 and evolved over most of its history, they know relatively little about the first sec- onds that followed t ...
26 ASTRONOMY • MAY 2020 matter, scientists are learning about the first moments after the Big Bang. How fast is space expanding? ...
Velocity (km/s) Distance (megaparsecs) 0 500 1,000 01 2 WWW.ASTRONOMY.COM 27 But that’s not the end of the story. Cosmologists a ...
Normal matter 4.9% Dark matter 26.8% Dark energy 68.3% 60 65 70 75 80 CMB LOCAL UNIVERSE Planck (2018) SH0ES (2018) Carnegie (20 ...
WWW.ASTRONOMY.COM 29 at the same rate. Astronomers observed the orbit of Mercury to be slightly differ- ent from what Newtonian ...
30 ASTRONOMY • MAY 2020 ...
WWW.ASTRONOMY.COM 31 The Lowell Observatory astronomer’s revolutionary findings include the expansion of the universe and the di ...
32 ASTRONOMY • MAY 2020 Slipher’s astronomical studies went in several simultaneous directions. Shortly after his arrival in 190 ...
WWW.ASTRONOMY.COM 33 During his time spent on planetary research, Slipher also managed to keep investigating spectroscopic binar ...
34 ASTRONOMY • MAY 2020 was slow in coming. Some thought they were within the Milky Way, embryonic planetary systems in their ea ...
WWW.ASTRONOMY.COM 35 Clark telescope for further studies of nebulae. Before World War I was fin- ished, he studied spectral line ...
SKY THIS MONTH Visible to the naked eye Visible with binoculars Visible with a telescope 10° AURIGA GEMINI ORION TAURUS PERSEUS ...
10° CAPRICORNUS PEGASUS AQUARIUS Mars Enif d May 5, 4 A.M. Looking east Radiant WWW.ASTRONOMY.COM 37 RISING MOON I Cracks, crate ...
Path of the Sun (ecliptic) ` b ¡ _ ` a _ + a f d _ ` c b ` ` a b c ¡ _ a _ b ¡ d ` _ ` ` _ _ b a ¡ ` _ a d r ¡ _ b ` a m _ / a _ ...
12 3456789 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 SUN. MON. TUES. WED. THURS. FRI. SAT. MAY 2020 ` _ ...
AND TRI ARI PSC PEG SGE EQU LAC AQR CAP SCT AQL SER CYG LY R VUL PER OPH HER CRV COM CVn BOÖ CrB SER VIR LIB PSC CET SCL TAU FOR ...
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