Sky & Telescope - USA (2020-01)
GR EG G^ D IND ER MA N^ / S& T,^ S OU RC E:^ NA SA /^ J PL C ALT EC H qSPITZER’S JOURNEY Spitzer trails behind Earth in it ...
The Infrared Sky 20 JANUARY 2020 • SKY & TELESCOPE the bright emission of the atmosphere or the telescope itself, allows the ...
skyandtelescope.com • JANUARY 2020 21 begins within a few million years of the disks’ formation. Spitzer has also seen the very ...
The Infrared Sky 22 JANUARY 2020 • SKY & TELESCOPE throughout its orbit as it shows us different fractions of its starlit si ...
skyandtelescope.com • JANUARY 2020 23 star-formation rate. Combined with multiwavelength data from other instruments, these resu ...
The Infrared Sky 24 JANUARY 2020 • SKY & TELESCOPE The Farthest Galaxy Spitzer Can See Spitzer’s redshift limit is currently ...
skyandtelescope.com • JANUARY 2020 25 C os m ic s ta r^ f or m at io n^ ra te (s ol ar m as se s^ pe r^ y ea r^ p er m illi on l ...
FORENSIC ASTRONOMY by Jeffrey Dobereiner 26 JANUARY 2020 • SKY & TELESCOPE In a historic Omaha court case, astronomical evid ...
AL L^ P HO TO S^ C OU RT ES Y^ O F^ C RE IGH TO N^ U NIV ER SIT Y skyandtelescope.com • JANUARY 2020 27 The public was fascinate ...
Forensic Astronomy 28 JANUARY 2020 • SKY & TELESCOPE in a court of law. He went to the church and redrew the profi le of the ...
skyandtelescope.com • JANUARY 2020 29 Equation of time Orbital eccentricity Tilt of axis Jan. 1 Apr. 1 July 1 Ti m e^ di ffe re ...
FOCUS TOOLS by H. R. Suiter and W. P. Zmek 30 JANUARY 2020 • SKY & TELESCOPE Top row: A simple Hartmann mask helps to get cl ...
AL L^ I MA GE S^ C OU RT ES Y^ O F^ T HE AU TH OR S qWhether you’re a visual observer or astrophotographer, focus masks can take ...
Focus Tools 32 JANUARY 2020 • SKY & TELESCOPE There is, though it produces a complicated image to interpret. The answer is t ...
skyandtelescope.com • JANUARY 2020 33 diately display any mutual misalignment of the two smaller tilted regions. Another advanta ...
LIFE ON MARS, RECONSIDERED by Javier Barbuzano 34 JANUARY 2020 • SKY & TELESCOPE ...
skyandtelescope.com • JANUARY 2020 35 Discoveries of life deep beneath Earth’s surface are provoking scientists to wonder what m ...
36 JANUARY 2020 • SKY & TELESCOPE Life on Mars, Reconsidered pHYDROTHERMAL TULIPS Giant tubeworms (Riftia pachyptila) live a ...
skyandtelescope.com • JANUARY 2020 37 pANCIENT WATERS Members of Barbara Sherwood Lollar’s team take samples of water in rock fi ...
38 JANUARY 2020 • SKY & TELESCOPE Life on Mars, Reconsidered Erosion of atmosphere Magnetic field Seas and lakes Global ocea ...
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