The sky on
your birthday.
The 220 Mirrors of CRTF
The Central Receiver Test Facility in New Mexico uses 220 mirrors, each over 7 meters in diameter. These mirrors focus sunlight onto a single tower. CRTF's primary purpose is to research methods for collecting and using solar power. It does not create sky images like a traditional telescope, but rather gathers light over a vast area.
We cannot put this date's photograph on paper at poster size. We can print the nearest public archive plate to your date instead.
See print sizesPrinted, shipped and sold by Zazzle
Released on your day
Space pictures released on your month and day in other years, or a few days either side. Each one is sharp enough to print as a poster.
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Released on 4 October 2024 Westerlund 1 (wide-field view) See it as a poster -
Released on 4 October 2010 Star formation fireworks in Orion See it as a poster -
Released on 4 October 2021 NGC 4676: When Mice Collide See it as a poster -
Released on 4 October 2005 NASA Space Observatories Glimpse Faint Afterglow of Nearby Stellar Explosion See it as a poster -
Released on 4 October 2021 A Dangerous Dance See it as a poster
In tropical astrology, 4 OCT 1999 falls under Libra (♎). The sign's window runs from 09-23 through 10-22. Libra is the only zodiac constellation named for an inanimate object, the scales of judgment. The Sun was crossing this region of the sky on 4 OCT 1999.
Questions about October 4, 1999
What space photo was released on October 4, 1999?
NASA's Astronomy Picture of the Day for October 4, 1999 was "The 220 Mirrors of CRTF". It's the card at the top of this page.
What was the Moon's phase on October 4, 1999?
A last quarter moon, about 32% lit.
What day of the week was October 4, 1999?
October 4, 1999 was a Monday, day 277 of the 365 days in 1999.
Is it free?
Yes. Seeing, sharing and downloading the card is free, and there's no account to make.