How long does it take to form a molecular cloud?

How Many Infrared Dark Clouds can form Massive Stars and Clusters?

How Massive are Massive Compact Galaxies?

How Starless Are Starless Cores?

How to make an ultra-faint dwarf spheroidal galaxy: tidal stirring of disky dwarfs with shallow dark matter density profiles

HST Images and KPNO Spectroscopy of the Binary Black Hole Candidate SDSS J153636.22+044127.0

HST Observations of the Stellar Distribution Near Sgr A*

HST Palpha Survey of the Galactic Center -- Searching the missing young stellar populations within the Galactic Center

HST Paschen-alpha Survey of the Galactic Center: Data Reduction and Products

HST's hunt for intermediate-mass black holes in star clusters

HST/ACS color-magnitude diagrams of candidate intermediate-age M 31 globular clusters. The role of blue horizontal branches

HST/ACS Photometry of Old Stars in NGC 1569: The Star Formation History of a Nearby Starburst

HST/NICMOS observations of the GLIMPSE9 stellar cluster

HST/NICMOS Paschen-alpha Survey of the Galactic Center: Overview

HST/WFPC2 Imaging of the Dwarf Satellites And XI and And XIII : HB Morphology and RR Lyraes

Hubble Space Telescope Imaging of Post-Starburst Quasars

Hubble Space Telescope NICMOS Polarization Observations of Three Edge-on Massive YSOs

Hubble Space Telescope Observations of Field Ultracool Dwarfs at High Galactic Latitude

Hubble Space Telescope Survey of Interstellar High-Velocity Si III

Hubble-COS Observations of Galactic High-Velocity Clouds: Four AGN Sight Lines through Complex C