We've just begun "International Dark Sky Week." Check out their page to learn more about light pollution and how YOUR actions can make a difference.

https://darksky.org/

#wherethestarshangout
about 1 month ago, Lisa Swaney
This is a great time of the month and year to observe ""earthshine!"" Are you familiar with what earthshine is?

Earthshine is a dull glow which lights up the unlit part of the Moon because the Sun’s light reflects off the Earth's surface and back onto the Moon. It is also sometimes called ""ashen glow"", ""the old Moon in the new Moon's arms"", or the ""Da Vinci glow"", after Leonardo da Vinci, who explained the phenomenon for the first time in recorded history. Earthshine is best seen a few days before and after a New Moon, right after sunset or before sunrise. Scientists studying global warming found that earthshine is more intense in April and May!

Check out this beautiful picture and example of an Earthshine morning moon, taken by Tom Wildoner in 2016.

Hopefully you will have the chance to check it out this month and next! SOURCE: timeanddate.com IMAGE: Tom Wildoner"
about 1 month ago, Lisa Swaney
A sky with a waxing crescent moon and orange clouds. Trees are in the foreground.
Have a great week everyone!

#wherethestarshangout
about 1 month ago, Lisa Swaney
Have a great week everyone!
Did you know? Back on this date in 1961, Yuri Gagarin became the first human to travel into space!
about 1 month ago, Lisa Swaney
Did you know? Back on this date in 1961, Yuri Gagarin became the first human to travel into space!
We have a great pair of shows for this Saturday!

At 11am, we'll show ""One World, One Sky: Big Bird's Adventure,"" which is a favorite of many young planetarium visitors. Later at 1pm, we'll feature the new-to-us-show ""Unseen Earth: Observe, Understand, Respond."" Save your seats online at www.ticketleap.events/events/hdplanetarium or available tickets can be sold up to showtime. Have a great weekend, everyone!

about 1 month ago, Lisa Swaney
🌠 Happy Fun Fact Friday! Did you know that meteor showers come from debris left behind by comets, not shooting stars?! #wherethestarshangout
about 1 month ago, Lisa Swaney
🌠 Happy Fun Fact Friday! Did you know that meteor showers come from debris left behind by comets, not shooting stars?! #wherethestarshangout
We are deeply appreciative of the financial support received to date, but our efforts are ongoing. Please consider contributing to our 'Don't Let the Planetarium Go Dark' upgrade campaign, as every contribution makes an impact. #wherethestarshangout
about 1 month ago, Lisa Swaney
We are deeply appreciative of the financial support received to date, but our efforts are ongoing. We invite you to consider contributing to our 'Don't Let the Planetarium Go Dark' upgrade campaign, as every contribution makes an impact.
Join us for a really great children's show today! Little Draggy Adventure begins at 11am. And, tickets are only $5/person. Grab them at www.ticketleap.events/events/hdplanetarium!

#wherethestarshangout
about 1 month ago, Lisa Swaney
Join us for a really great children's show today! Little Draggy Adventure begins at 11am. And, tickets are only $5/person. Grab them at www.ticketleap.events/events/hdplanetarium! #wherethestarshangout
The usually hard-to-spot planet Mercury rises shortly before sunrise during April, a little south of due east.

At the beginning of the month, Mercury rises nearly an hour before Sun, but remember that it will rise earlier each day. So, you should be able to see it in the morning, until about April 19th. Be careful and stop looking towards it once the sun gets over the horizon, so you don't damage your eyes! SOURCE: adlerplanetarium.org
about 2 months ago, Lisa Swaney
A dark blue sky with stars. The words "April 3, 2026" and "Mercury" are shown. A yellow logo and #LOOKUP appear.
Have a great week everyone!

Also, don't forget that we have Sunset Meditation on Wednesday. If you are interested in attending, be sure to register ASAP on the Waukesha County website!

#wherethestarshangout
about 2 months ago, Lisa Swaney
Have a great week everyone!  Also, don't forget that we have Sunset Meditation on Wednesday. If you are interested in attending, be sure to register ASAP on the Waukesha County website!  #wherethestarshangout
Happy Easter, all!

#wherethstarshangout
about 2 months ago, Lisa Swaney
Happy Easter
New month = new Saturday shows at the planetarium! 🌟

11am: One World, One Sky: Big Bird’s Adventure
1pm: Unseen Earth: Observe, Understand, Respond

$5/person/show 🎟️
Get tickets: www.ticketleap.events/events/hdplanetarium
or buy at the door!

#wherethestarshangout
about 2 months ago, Lisa Swaney
New month = new Saturday shows at the planetarium! 🌟  11am: One World, One Sky: Big Bird’s Adventure 1pm: Unseen Earth: Observe, Understand, Respond  $5/person/show 🎟️ Get tickets: www.ticketleap.events/events/hdplanetarium  or buy at the door!  #wherethestarshangout
New month = new Saturday shows at the planetarium! 🌟  11am: One World, One Sky: Big Bird’s Adventure 1pm: Unseen Earth: Observe, Understand, Respond  $5/person/show 🎟️ Get tickets: www.ticketleap.events/events/hdplanetarium  or buy at the door!  #wherethestarshangout
🪐 Fun Fact: Saturn is so low-density it would float in water—if you could find a bathtub big enough.
about 2 months ago, Lisa Swaney
🪐 Fun Fact: Saturn is so low-density it would float in water—if you could find a bathtub big enough.
"📣PLEASE NOTE📣 The
Horwitz-DeRemer Planetarium & Retzer Nature Center
will have very LIMITED access to internet today (and
possible phone service). Regardless, we will be running
all laser shows as scheduled.

We hope you were able to join us this week for our
spring break laser show schedule! Today is our last day
of shows. Please let us know how you enjoyed your
laser show experience!

Can't make it to the planetarium today...don't fret! We'll
have TWO traditional planetarium shows on Saturday!
#wherethestarshangout"
about 2 months ago, Lisa Swaney
📣PLEASE NOTE📣 The Horwitz-DeRemer Planetarium & Retzer Nature Center will have very LIMITED access to internet today (and possible phone service). Regardless, we will be running all laser shows as scheduled.  We hope you were able to join us this week for our spring break laser show schedule! Today is our last day of shows. Please let us know how you enjoyed your laser show experience!  Can't make it to the planetarium today...don't fret! We'll have TWO traditional planetarium shows on Saturday! #wherethestarshangout
Are you ""staycationing"" for spring break? If so, have you visited the planetarium yet?! Check out our schedule for today!
Purchasing tickets in advance is always a good idea at www.ticketleap.events/events/hdplanetarium.
about 2 months ago, Lisa Swaney
"Are you ""staycationing"" for spring break?  If so, have you visited the planetarium yet?! Check out our schedule for today! Purchasing tickets in advance is always a good idea at www.ticketleap.events/events/hdplanetarium.   OH! And, don't forget to look UP tonight at the Pink Full Moon! 🌕 #wherethestarshangout"
Happy Tuesday, everyone!

We have another great lineup today, and really for the rest of this week! Tickets are $8.00/person/show. All purchases benefit our planetarium system upgrade ""Don't Let the Planetarium Go Dark!""

Hope to see you soon!

#wherethestarshangout
about 2 months ago, Lisa Swaney
Happy Tuesday, everyone!  We have another great lineup today, and really for the rest of this week!  Tickets are $8.00/person/show.  All purchases benefit our planetarium system upgrade ""Don't Let the Planetarium Go Dark!""  Hope to see you soon! #wherethestarshangout
Spring break has arrived (for some of us, at least!) Please check out what's on our laser show schedule today!

Tickets are $8. We strongly encourage you to purchase tickets ahead of time at the ticketing link in our bio. Please note that no free passes are valid today.

about 2 months ago, Lisa Swaney
Spring break has arrived (for some of us, at least!) Please check out what's on our schedule today! We have shows day and night for all types of music lovers!  Tickets are $8.00/person for each show. We strongly encourage you to purchase tickets ahead of time at the ticketing link in our bio. Please note that no free passes are valid for admission today.  #wherethestarshangout
The Horwitz-DeRemer Planetarium is on Tripadvisor! If you joined us for a show and enjoyed your experience, we would appreciate if you take a moment to rate and comment on your visit. We just simply want to remind Waukesha area residents about our amazing planetarium!!
about 2 months ago, Lisa Swaney
The Horwitz-DeRemer Planetarium is on Tripadvisor!  If you joined us for a show and enjoyed your experience, we would appreciate if you take a moment to rate and comment on your visit.  We just simply want to remind Waukesha area residents about our amazing planetarium, as well as encourage visitors to the area to come see us! #wherethestarshangout
Last chance for the March Saturday shows today!

11AM- ""Did an Asteroid Really Kill the Dinosaurs?""
1PM-""Stellar Women in Astronomy.""

Tickets are only $5.

Purchase ahead of time or available seats will be sold at the door.

Hope 2 C U!
about 2 months ago, Lisa Swaney
It's your last chance to check out our March Saturday shows today!  At 11am, we'll feature ""Did an Asteroid Really Kill the Dinosaurs?"" Later, come see the new show ""Stellar Women in Astronomy."" Tickets are only $5.00 per person. You can purchase ahead of time or available seats will be sold at the door. Hope to see you soon! #wherethestarshangout
Attention Spring Break Staycationers!

Have you planned your week out yet?! Don't forget that we have an amazing schedule, filled with music laser shows next week ONLY, Monday through Thursday!

We definitely recommend purchasing your tickets ahead of time to save you spots!
about 2 months ago, Lisa Swaney
Attention Spring Break Staycationers!  Have you planned your week out yet?!  Don't forget that we  have an amazing schedule, filled with music laser shows next week ONLY, Monday through Thursday!   We definitely recommend purchasing your tickets ahead of time to save you spots!
Attention Spring Break Staycationers!  Have you planned your week out yet?!  Don't forget that we  have an amazing schedule, filled with music laser shows next week ONLY, Monday through Thursday!   We definitely recommend purchasing your tickets ahead of time to save you spots!