Astro Pic of the Day

astropic.ps1

# Download the page 
$page = Invoke-WebRequest -Uri "https://apod.nasa.gov/apod/astropix.html"

# Extract a list of all links to a full-size image
$imageLinks = $page.Links | Where-Object outerHTML -Like '*href="image/*'

# Extract the relative path from the HREF attribute
$link = $imageLinks | Select-String -Pattern '"(.*?)"' | % { $_.Matches.Groups[1].Value } 

$link | ForEach-Object { 
    # Construct the full URL to the image
    $fullUrl = "https://apod.nasa.gov/apod/$($_)"

    # Create a friendly output name, changing "image/YEAR/FILE_NAME.jpg" to "YEAR_FILE_NAME.jpg"
    $outFile = $_.Substring(6) -Replace "/", "_"

    # Download to the current directory
    Write-Output "Downloading file: $fullUrl to $outFile"
    Invoke-WebRequest -Uri $fullUrl -OutFile $outFile
}