Come on guys, the answers are a google away
You can do this
BA in Physics (Harvard University) 1980
Master's Degree in Astronomy (University of Texas) 1983
Master's Degree in Astrophysics (Columbia University) 1989
Doctorate in Astrophysics (Columbia University) 1991
Post-Doctoral Research Associate (Princeton University) from 1991 to 1994
Appointed Director of Hayden Planetarium, 1996
Publications:
Merlin's Tour of the Universe (1989, 1998)
Universe Down to Earth (1994)
Just Visiting This Planet (1998)
One Universe: At Home in the Cosmos (2000)
Cosmic Horizons: Astronomy at the Cutting Edge (2000)
City of Stars: A New Yorker's Guide to the Cosmos (2002)
My Favorite Universe (a 12-part lecture series) (2003)
Origins: Fourteen Billion Years of Cosmic Evolution (2004)
The Sky Is Not the Limit: Adventures of an Urban Astrophysicist (2004)
Death By Black Hole: And Other Cosmic Quandaries (2007)
The Pluto Files: The Rise and Fall of America's Favorite Planet (2009)
Space Chronicles: Facing the Ultimate Frontier (2012)
Welcome To The Universe: An Astrophysical Tour (2016)
Astrophysics For People In A Hurry (2017)
Research Publications:
"UVBY Photometry of Blue Stragglers in NGC 7789". Astronomical Journal (1985)
"Bursting Dwarf Galaxies: Implications for Luminosity Function, Space Density, and Cosmological Mass Density". Astrophysical Journal (1988)
"On the possibility of Gas-Rich Dwarf Galaxies in the Lyman-alpha Forest". Astrophysical Journal (1988)
"Radial Velocity Distribution and Line Strengths of 33 Carbon Stars in the Galactic Bulge". Astrophysical Journal (1991)
"An Exposure Guide for Taking Twilight Flatfields with Large Format CCDs". Astronomical Journal (1993)
"On the Possibility of a Major Impact on Uranus in the Past Century". Astronomy & Astrophysics (1993)
"The Expanding Photosphere Method Applied to SN1992am at cz = 14600 km/s". Astronomical Journal (1994)
"The Type Ia Supernova 1989B in NGC3627 (M66)". Astronomical Journal (1994)
"BVRI Light Curves For 29 Type Ia Supernovae". Astronomical Journal (1996)
"Optical light curves of the Type IA supernovae SN 1990N and 1991T". Astronomical Journal (1998)
"The Cosmic Evolution Survey (COSMOS): Overview". Astrophysical Journal Supplement (2007)
"COSMOS: Hubble Space Telescope Observations". Astrophysical Journal Supplement (2007)
"The Faint-End Slopes of Galaxy Luminosity Functions in the COSMOS Field". Astrophysical Journal (2008)
Considering his last two publications were 2016 and 2017 and he hasn't stepped down from Director of Hayden Planetarium, I'd say you're looking at a fairly active scientist and researcher in their field