Bob Riddle
@currentsky.bsky.social
Semi-Retired Teacher (Earth Science/Planetarium Director-43 yrs.). Column Editor Scope on the Skies, Science Scope Magazine (National Science Teaching Association). NASA Volunteer Educator Since 1985: Cassini Fellow; ISTP;SSEP;SSA. Day or night photography
January 30 - 7pm CDT
A conjunction with the Moon, Jupiter, and the 'Twin' stars.
A conjunction with the Moon, Jupiter, and the 'Twin' stars.
January 30, 2026 at 2:55 PM
January 30 - 7pm CDT
A conjunction with the Moon, Jupiter, and the 'Twin' stars.
A conjunction with the Moon, Jupiter, and the 'Twin' stars.
It's International Education Day today, January 24th.
Thank a Teacher for their service.
Thank a Teacher for their service.
January 24, 2026 at 2:25 PM
It's International Education Day today, January 24th.
Thank a Teacher for their service.
Thank a Teacher for their service.
The slightly more waxing crescent Moon is moving in on the planet Saturn.
January 22, 2026 at 8:33 PM
The slightly more waxing crescent Moon is moving in on the planet Saturn.
If the skies are clear enough and the temperature is not too low for your liking then step outside to see the thin waxing crescent over the western horizon.
January 21, 2026 at 9:27 PM
If the skies are clear enough and the temperature is not too low for your liking then step outside to see the thin waxing crescent over the western horizon.
My latest Substack essay
open.substack.com/pub/starwalk...
open.substack.com/pub/starwalk...
On Top of the World
Is there a top or bottom to the Earth?
open.substack.com
January 20, 2026 at 12:28 AM
My latest Substack essay
open.substack.com/pub/starwalk...
open.substack.com/pub/starwalk...
Earth closet to the Sun today - known as perihelion.
www.timeanddate.com/astronomy/pe...
www.timeanddate.com/astronomy/pe...
Perihelion, Aphelion and the Solstices
Earth is closest to the Sun two weeks after the December solstice and farthest from the Sun two weeks after the June Solstice.
www.timeanddate.com
January 2, 2026 at 4:46 PM
Earth closet to the Sun today - known as perihelion.
www.timeanddate.com/astronomy/pe...
www.timeanddate.com/astronomy/pe...
Despite all that's been thrown at me I am still standing!
December 30, 2025 at 10:06 PM
Despite all that's been thrown at me I am still standing!
Watch for the waxing crescent Moon to be near Saturn this evening. Jupiter is still near the Gemini Twins, but rises a little later.
December 26, 2025 at 9:38 PM
Watch for the waxing crescent Moon to be near Saturn this evening. Jupiter is still near the Gemini Twins, but rises a little later.
Not really us. but our wishes for a Merry Christmas are for real from us- Heidi. Sam, Monty, Bob, and Susan.
December 25, 2025 at 12:21 AM
Not really us. but our wishes for a Merry Christmas are for real from us- Heidi. Sam, Monty, Bob, and Susan.
Where have I been and why?
2 months ago I had spine surgery that unfortunately didn't go as planned.
Now in a medical rehab facility for rehab and on antibiotics to deal with other complications.
But the Sun still shines and the winter stars and constellations are doing their thing at night.
2 months ago I had spine surgery that unfortunately didn't go as planned.
Now in a medical rehab facility for rehab and on antibiotics to deal with other complications.
But the Sun still shines and the winter stars and constellations are doing their thing at night.
December 16, 2025 at 2:58 AM
Where have I been and why?
2 months ago I had spine surgery that unfortunately didn't go as planned.
Now in a medical rehab facility for rehab and on antibiotics to deal with other complications.
But the Sun still shines and the winter stars and constellations are doing their thing at night.
2 months ago I had spine surgery that unfortunately didn't go as planned.
Now in a medical rehab facility for rehab and on antibiotics to deal with other complications.
But the Sun still shines and the winter stars and constellations are doing their thing at night.
Here's my latest essay on Substack.
The Earth has 2, Maybe 3, Moons
One is our full-time Moon; the others are a 'quasi-satellite' or are they a Mini-Moon?
open.substack.com
November 18, 2025 at 2:04 PM
Here's my latest essay on Substack.
Be sure to thank a Veteran. We did it for you.
November 11, 2025 at 1:32 PM
Be sure to thank a Veteran. We did it for you.
Something to share. Like the saying goes, "It's our home, our only home."
NASA’s Juno spacecraft during its Earth flyby to capture this Oct. 9. 2013
Key details:
• Distance: Approximately 4,000 km from Earth.
• Region visible: South America and Antarctica.
• Source: NASA’s Juno mission.
NASA’s Juno spacecraft during its Earth flyby to capture this Oct. 9. 2013
Key details:
• Distance: Approximately 4,000 km from Earth.
• Region visible: South America and Antarctica.
• Source: NASA’s Juno mission.
November 9, 2025 at 4:19 PM
Something to share. Like the saying goes, "It's our home, our only home."
NASA’s Juno spacecraft during its Earth flyby to capture this Oct. 9. 2013
Key details:
• Distance: Approximately 4,000 km from Earth.
• Region visible: South America and Antarctica.
• Source: NASA’s Juno mission.
NASA’s Juno spacecraft during its Earth flyby to capture this Oct. 9. 2013
Key details:
• Distance: Approximately 4,000 km from Earth.
• Region visible: South America and Antarctica.
• Source: NASA’s Juno mission.
A late night get together! Should be fun, the Twins are here!!
November 8, 2025 at 9:15 PM
A late night get together! Should be fun, the Twins are here!!
Been hospitalized for the last 3 weeks
However the universe didn't take a break.
If you have a clear look toward the west this evening or tomorrow right around sunset you may able to see Mercury and Mars in a fairly close conjunction.
However the universe didn't take a break.
If you have a clear look toward the west this evening or tomorrow right around sunset you may able to see Mercury and Mars in a fairly close conjunction.
November 7, 2025 at 4:40 PM
Been hospitalized for the last 3 weeks
However the universe didn't take a break.
If you have a clear look toward the west this evening or tomorrow right around sunset you may able to see Mercury and Mars in a fairly close conjunction.
However the universe didn't take a break.
If you have a clear look toward the west this evening or tomorrow right around sunset you may able to see Mercury and Mars in a fairly close conjunction.
The crew says go Chiefs, and let's get Bob discharged from the hospital so he can come and see us, Sue, and watch the Chiefs win.
October 19, 2025 at 2:56 PM
The crew says go Chiefs, and let's get Bob discharged from the hospital so he can come and see us, Sue, and watch the Chiefs win.
Here's a short video showing the path of Comet C/2025 A6 (Lemmon) from October 15-23. Set at 1-day intervals at 8pm CDT.
October 15, 2025 at 1:21 PM
Here's a short video showing the path of Comet C/2025 A6 (Lemmon) from October 15-23. Set at 1-day intervals at 8pm CDT.
Messier 8, Messier 20, and Messier 21 are all located in the constellation Sagittarius.
M8, aka the Lagoon Nebula, is an emission nebula.
M20, aka The Trifid Nebula, is three different types of nebulae: emission, reflection, and dark nebula.
M21, aka NGC 6531, is an open star cluster.
M8, aka the Lagoon Nebula, is an emission nebula.
M20, aka The Trifid Nebula, is three different types of nebulae: emission, reflection, and dark nebula.
M21, aka NGC 6531, is an open star cluster.
October 12, 2025 at 1:33 PM
Messier 8, Messier 20, and Messier 21 are all located in the constellation Sagittarius.
M8, aka the Lagoon Nebula, is an emission nebula.
M20, aka The Trifid Nebula, is three different types of nebulae: emission, reflection, and dark nebula.
M21, aka NGC 6531, is an open star cluster.
M8, aka the Lagoon Nebula, is an emission nebula.
M20, aka The Trifid Nebula, is three different types of nebulae: emission, reflection, and dark nebula.
M21, aka NGC 6531, is an open star cluster.
It's Earth Science Week and the Crew says, "Love your Mother!"
Here's an interesting article about 'Mother Earth'.
"What a Wonderful World! 75 Absolutely Fascinating Facts About Planet Earth"
bit.ly/4n4s9mV
Here's an interesting article about 'Mother Earth'.
"What a Wonderful World! 75 Absolutely Fascinating Facts About Planet Earth"
bit.ly/4n4s9mV
October 12, 2025 at 12:30 PM
It's Earth Science Week and the Crew says, "Love your Mother!"
Here's an interesting article about 'Mother Earth'.
"What a Wonderful World! 75 Absolutely Fascinating Facts About Planet Earth"
bit.ly/4n4s9mV
Here's an interesting article about 'Mother Earth'.
"What a Wonderful World! 75 Absolutely Fascinating Facts About Planet Earth"
bit.ly/4n4s9mV
Here’s my latest essay - about comets and information about C/2025 A^ (Lemmon) and its appearance in the evening skies now.
starwalk.substack.com/p/chasing-ba...
starwalk.substack.com/p/chasing-ba...
October 9, 2025 at 5:54 PM
Here’s my latest essay - about comets and information about C/2025 A^ (Lemmon) and its appearance in the evening skies now.
starwalk.substack.com/p/chasing-ba...
starwalk.substack.com/p/chasing-ba...
Lunch Time?
Take a mellow flight across some of Martian terrain compliments of the ESA.
www.youtube.com/watch?v=6E6C...
Take a mellow flight across some of Martian terrain compliments of the ESA.
www.youtube.com/watch?v=6E6C...
Fly over Xanthe Terra with Mars Express
YouTube video by European Space Agency, ESA
www.youtube.com
October 7, 2025 at 4:36 PM
Lunch Time?
Take a mellow flight across some of Martian terrain compliments of the ESA.
www.youtube.com/watch?v=6E6C...
Take a mellow flight across some of Martian terrain compliments of the ESA.
www.youtube.com/watch?v=6E6C...
A Comet & the Full Moon
Measuring the comets movement - despite the Moon!
starwalk.substack.com
October 6, 2025 at 1:41 PM
Check out my latest essay.
starwalk.substack.com/p/the-crew-h...
starwalk.substack.com/p/the-crew-h...
The Crew Hits the Road to South Dakota
A road trip to Mt Rushmore and the Crazy Horse Memorial with Heidi, Monty, and Sam
starwalk.substack.com
October 1, 2025 at 4:43 PM
Check out my latest essay.
starwalk.substack.com/p/the-crew-h...
starwalk.substack.com/p/the-crew-h...
The October issue of Qué tal in the Current Skies is now available online at https:currentsky.com.
Several conjunctions, the Orionid Meteor Shower, and the brightening of Comet C2025 A6 (Lemmon)are on the docket for this month.
Several conjunctions, the Orionid Meteor Shower, and the brightening of Comet C2025 A6 (Lemmon)are on the docket for this month.
September 30, 2025 at 11:39 PM
The October issue of Qué tal in the Current Skies is now available online at https:currentsky.com.
Several conjunctions, the Orionid Meteor Shower, and the brightening of Comet C2025 A6 (Lemmon)are on the docket for this month.
Several conjunctions, the Orionid Meteor Shower, and the brightening of Comet C2025 A6 (Lemmon)are on the docket for this month.